I am currently using iqoo neo 7 pro device but I am surprised that whenever I use small window in it, it supports floating window only in some apps.

it doesn't support small window all 3rd party apps,,,,I have used realme phones, Samsung phones,redmi phones and also OnePlus Phones,,,,All these phone support every 3rd party apps in small window but in funtouch os only few apps support this,,,,why you don't provide every app to be used in small window mode? I am literally so sad because it is very bad,,,, please give this feature so that we can use every single 3rd party app in floating window for multitasking....otherwise I will surely not buy any other phone of iqoo or vivo in my life because this is very simple feature and you are not providing this....