To be fair for Manjaro I tested more modern kernel version 6.1.28-1 and with KDE Plasma version 5.27.4
+ More usable than older Manjaro I tested.
- If you write wrong SIM-pin, it did not tell that it was wrong.
- Every start it asks the timezone.
- Cellular network settings wasn't so goog than in Postmarket OS.
- Didn't work in vertical.

After these tests, now I can safely say Maemo Leste is the best OS for Pinephone.