Hi everyone and thank you in advance for your support!
Long story short my system is in Read only mode after a reboot and I don't know what caused it.
Some useful info before the reboot:
I've been trying to install a RAID1 configuration so at certain point I did
sudo update-initramfs -u
I have manually updated and upgraded (only busybox was upgraded) with
sudo apt update && sudo apt upgrade
If you need any other info let me know!
EDIT:
I found out that I'm able to manually mount the root partition, but the problem persist after each reboot. I then added the follong to /boot/armbianEnv.txt
extraargs=fsck.mode=force fsck.repair=yes
and
touch /forcefsck
and tried a reboot but nothing changes. It seems that there are some errors in the boot partition and this leads it to go Read-only