Help, I don't know what I did but after installing a custom ROM, I noticed that my system partition cannot be mounted as read/write.
"mount -o rw,remount /system" command on a terminal emulator, ADB shell, and TWRP terminal
The command shows no feedback showing failure (maybe I succeeded?)
Mount it using the built-in TWRP mount function.
The system check box can be checked out (it doesn't retain its check mark on reboot)
Some apps that actually works according to sources and reviews.
Some say (Failure to mount..) Some say (System mounted as rw) some doesn't have feedback.
I don't know what to do.
I noticed this when I installed a custom ROM. I tried using another custom ROM but same thing. Also reformatting doesn't help. I don't know if this occur on the stock ROM.
Device: Xiaomi Mi A2
Android version: Android 10
Custom ROM: AICP nightly build 15.0