There is an option for different layout of the start screen, where all apps are visible on main screen and there is no app drawer. Pinch in on home screen and enter the settings. Could have happened in your pocket maybe?
I'm on Exynos version and I must say that battery life is not what it used to be. It's like percentage is falling faster than on OneUI6 while I'm using the phone.
If it's just streaming apps, then this might be a clue. Does it happen on 5g as well? One more thing I thought of is, go to wifi / intelligent wifi and see if you have power saving for wifi enabled.
My Spotify usually takes few gigs for cached songs. And it's not the type of cache that is deleted with generic Clear Cache button. You have to do it within Spotify as it holds it in app data.