@zero1976, Maybe my post is useless.
I tested with an old Canon MX340.
USB worked and in LMDE 7 by wifi as well.
In EnOS wayland I switched off firewall similar case in the past.
Now with
simple-scan -d
wifi mode is unreliable here but out of 5 attempts at least 1 scan is successful.
Finally, if you are planning a reinstall IMHO BTRFS Snapshots are well worth it.