Why is this a stalemate?

Where is the check in that position? There isn't one. Ok so white should make a move? He can't because there isn't a single legal move for him on the board. No check and no legal moves while on the move = stalemate.
Q6f3# instead and you would have won because of checkmate.

bruh are serious...... YOU CANT CAPTURE KINGS YOU CAN ONLY THREATEN THEM what do you mean capture??????

Why was this game called a draw?
The answer is that you don't know what "stalemate" is. You should look it up, it's absolutely essential.

A stalemate often occurs in negotiations or conflicts when both parties are unable to reach an agreement, typically due to irreconcilable differences or a lack of willingness to compromise. Factors contributing to a stalemate include entrenched positions, lack of trust, and external pressures that reinforce the status quo. This situation can hinder progress and lead to frustration, as both sides remain at an impasse. The resolution may require third-party mediation or a change in circumstances to break the deadlock and foster dialogue .
You clearly used ChatGPT because that is wrong as [removed]

A stalemate often occurs in negotiations or conflicts when both parties are unable to reach an agreement, typically due to irreconcilable differences or a lack of willingness to compromise. Factors contributing to a stalemate include entrenched positions, lack of trust, and external pressures that reinforce the status quo. This situation can hinder progress and lead to frustration, as both sides remain at an impasse. The resolution may require third-party mediation or a change in circumstances to break the deadlock and foster dialogue .
You clearly used ChatGPT because that is wrong as [removed]
It's a spambot.
It's also incredibly weird that a moderator bothers to remove a minor vulgarity, but leaves the spam untouched. The other way around would make sense.
I moved my second queen to f4 from f6 while their king was at h3. Why was this game called a draw? I clearly won. Any move he makes next I would capture their king.
In order to win the game you need to checkmate (attack the king in such a way that they have no legal moves that can get themself out of that attack) your opponent's king. In order to so, you need to give your opponent a way to legally move before you can checkmate the king.
In your game, you put your opponent in a position where they had only one legal move (Kg4). You successfully closed the mating net and were in a perfect position to win. Instead of 39...Q6f4?? You had 5 different moves where you could have attacked the opponent king and they would have had no legal way to get out of that attack.
I suggest taking some time to understanding what checkmate and stalemate are. Also, you should look up videos or lessons on how to mate with a king and queen vs a king as well as ladder mates. If you do so, you will give away fewer half points due to stalemating your opponent.

Setting aside wins on time, chess is won by checkmate. Checkmate requires the king is currently being attacked (the king is in check), and there is no move the player can make that gets them out of check. So they can't move the king out of check, they can't block the check, and they can't capture the piece delivering check.
Stalemate is when there is no legal move a player can make but it is their turn and their king is not in check. That's a draw because they are not checkmated (their king isn't in check) but their opponent left them with legal moves. Since they cannot move the game stalls, but they have not lost because they are not in checkmate, and they have not won because their opponent is not in checkmate, as such the game is a draw.
In your example, White only has a king, but you left that king with no legal moves but did not check the king, so you stalemated them.

Setting aside wins on time, chess is won by checkmate. Checkmate requires the king is currently being attacked (the king is in check), and there is no move the player can make that gets them out of check. So they can't move the king out of check, they can't block the check, and they can't capture the piece delivering check.
Stalemate is when there is no legal move a player can make but it is their turn and their king is not in check. That's a draw because they are not checkmated (their king isn't in check) but their opponent left them with legal moves. Since they cannot move the game stalls, but they have not lost because they are not in checkmate, and they have not won because their opponent is not in checkmate, as such the game is a draw.
In your example, White only has a king, but you left that king with no legal moves but did not check the king, so you stalemated them.
So because he can't move because he will be in check it will be stalemate and be shown as a draw because white only had that piece to move but all the squares to move is in power of the queens. And in chess that's not a legal move to go to those squares where any piece can capture you... Around the 700s I think some people decided to make checkmate and that the king can never be captured but you didn't put him in threat where he has a legal move... Isn't checkmate because he isn't in check

Setting aside wins on time, chess is won by checkmate. Checkmate requires the king is currently being attacked (the king is in check), and there is no move the player can make that gets them out of check. So they can't move the king out of check, they can't block the check, and they can't capture the piece delivering check.
Stalemate is when there is no legal move a player can make but it is their turn and their king is not in check. That's a draw because they are not checkmated (their king isn't in check) but their opponent left them with legal moves. Since they cannot move the game stalls, but they have not lost because they are not in checkmate, and they have not won because their opponent is not in checkmate, as such the game is a draw.
In your example, White only has a king, but you left that king with no legal moves but did not check the king, so you stalemated them.
So because he can't move because he will be in check it will be stalemate and be shown as a draw because white only had that piece to move but all the squares to move is in power of the queens. And in chess that's not a legal move to go to those squares where any piece can capture you... Around the 700s I think some people decided to make checkmate and that the king can never be captured but you didn't put him in threat where he has a legal move... Isn't checkmate because he isn't in check
If White had a pawn on d4 though, then White would have a legal move as they can move the pawn to d5. But, if the pawn was on d2, it would again be stalemate since Black's piece in d3 prevents the pawn from moving, and again White has no legal move but their king is not in check.

Its a stalemate because you are not in check but you have no legal move that wouldn't put you in a check and since you cant put yourself in check then its a stalemate.
I moved my second queen to f4 from f6 while their king was at h3. Why was this game called a draw? I clearly won. Any move he makes next I would capture their king.