Just to give an update of my issue which I also discussed here https://community.e.foundation/t/didnt-succeed-to-enable-mobile-data-on-g6-plus/69924/16. I successfully installed LineageOS 22.2 which is android 15. Everything works fine. I expect to move with e/ U community when available with Android 15. I am missing the murena cloud and App loader, but could load applications manually and through F-droid. The default Lineage environment is pretty nice.