Funtouch OS 14 did add more app support for small window, but it is still just so LIMITED.

The apps that I hoped I would be able to use simultaneously while gaming/texting has no support for it. 

It is still in the beta testing phase, so I hope by the time beta testing ends, we can see most apps having support for small windows. 

(Some apps that I wanted to use in small windows are Brave, Hoyolab, Spotify,  Video players, etc.