how did you get Google ui to work on c715? send the tutorial please.Read again.
TCL has confirmed that its 2019 and 2020 Android TV models in Europe will be updated to Android 11 later this year. Here are the details.www.xda-developers.com
And even that they didn't manage to keep. Tcl doesn't care about the user experience. We're all just beta testers. They should give the software development to people who know what they are doing.
And btw. I use the new Google ui on my c715 and it works very well. So I don't know why tcl shouldn't upgrade to Google TV official. But it's TCL and as I say, they don't care.