Acquiring a new A21s with Android 11, I find that I cannot install one app that works perfectly in Android10 in a A20e. All other apps work on both phones.
Have tried Smart Switch transfer between the phones. Have tried the whole Samsung suggested app un-install, install, clear cache and data, and un-install, install Google play, etc. Nothing works.
My A20e ask me to upgrade to Android11. I have not done that yet, at least I have one phone working.