App Lounge will likely have severe problems with Android 11 (R). A forum 
Search for lavender brings at least two unofficial-builds .
- [UNOFFICIAL BUILD] Xiaomi Redmi Note 7 (lavender) for eOS-T 3.x
- [UNOFFICIAL BUILD] Xiaomi Redmi Note 7 (lavender) for eOS-a15
Moving to a current Android version will probably be an advantage all round.