Pardon @rik, but returning to Samsung Stock Android 11 is not necessary.
The slightly more complex installation process required for a first-time installation (converting .img to .tar) is explained very clearly in the LineageOS Wiki and only seems complicated to a novice.
Since @Bellini has already installed LineageOS Recovery, installing iodéOS 6.10 is very easy:
- Boot into LineageOS Recovery
- Select > Advanced > Enter Fastboot
alternatively (shorter route)
- 1 / 2.2 Boot directly into FastbootD mode
- fastboot flash vbmeta iode-6.10-20251208-gts4lv-vbmeta.img
- fastboot flash recovery iode-6.10-20251208-gts4lv-recovery.img
- Enter recovery / reboot into recovery - now the iodéOS recovery is there)
- Factory reset
6.1 Format data/facrtory reset
6.2 Format cache partition
6.3 Back to Menu - Apply update > Apply from ADB
- adb -d sideload iode-6.10-20251208-gts4lv-ota.zip
- Reboot system now
- Done!