Okay, turns out that apparently on Android 11, you cannot view anything within the Data folder, at all. Therefore, fixing the church is impossible unless you void the phone's warranty or something like that.
Ah ok, I will make sure that in the next android version, it is possible to reset the persistent data from the option menu. I will detail this in my devlog when the new version is released.
I just released a new version of the game, you can reset persistent data (the option is in the main menu, towards the title), but you can also delete saves (if you have some that are useless and you want to get rid of).