You had 21:06 and moved 24.Rxb6 in 3 seconds no wonder you missed it lol
I can solve easy and medium tactics but fail to spot them in actual games

You move fast in your games. You move fast doing tactics.
This question has been asked so many times, and yet people cant connect moving fast/lack of patience with not improving.
For me, the best way to spot tactics is to make them happen and hope that my opponent will fall into the trap. For instance, I try to make my opponent place his queen in front of his king so I can pin it, stuff like that.

Tactics are not accidental.
You have to plan them, they just don't randomly appear like in puzzle rush.
To find tactics you have to grow them by:
- Development with a plan
- Gaining of space on a side of the board (center, kingside, or quennside)
- Having a majority of force in an area
- Playing moves that makes opponents retreat or move into isolation.
Follow those four steps and you'll spot alot more tactics.
You can also come and watch my tactics training on twitch Fridays Blackmanrook when i do puzzles and talk about beginner and intermediate games.
I am doing all these blunders, in a thirty minute game. When I do tactics and if I see any of them I will usually do fine but when in real game I just throw tactically.