You can but they have to be in Live at the same time, allow incoming challenges and have your rating in their allowed rating range.
Live games on the app?

I don't know which app you are on but when you first launch the app you get an icon that shows you are logged into the Live server, on Android.
In order to challenge someone, to a Live game, they either have to also be logged in to the Live server, either on the app or website. On the latter, you have to manually do it.
I was wondering if it's possible to play live games against friends or specific people on the Chess.com app? Whenever I try to challenge somebody specific it says they are not available for live chess.
thankyou for your time