Download and Install AOSP Android 12 on Essential Phone (mata)
LineageOS 19 available Galaxy S10 series, Essential Phone - 9to5Google
OFFICIAL] LineageOS 18.1 for the Essential Phone | XDA Forums
My essential phone is locked like this without firmware... You can restore to a recovery, but unfortunately, the recovery is lost and you can't do anything...ㅠㅠ If there's a way to restore