Cause: Some ROMs (especially old CyanogenMod) leave a tiny /system partition.
Fix:
Create a full Nandroid backup in TWRP (system, data, boot). opengappsarm71pico20220215 install
Upon reboot, you will see the Android setup wizard. Because you used the Pico variant, you will not see a Google Setup Wizard (that is removed to save space). Instead: Cause: Some ROMs (especially old CyanogenMod) leave a
Verification: Go to Settings > Apps > See all apps > Show system. You should see "Google Play Services" and "Google Play Store." That is it. No Gmail, no Maps, no YouTube (you install those manually from the store). Verification: Go to Settings > Apps > See