It absolutely does, on Android at least. On iOS, given Apple’s restrictions, the whole situation is a bit more complicated:

https://ericmigi.com/blog/apple-restricts-pebble-from-being-awesome-with-iphones

I don’t know what your previous setup was, but given that running resolved fixes your DNS issues, run:

ln -sf ../run/systemd/resolve/stub-resolv.conf /etc/resolv.conf

This will point programs that use /etc/resolved.conf during DNS resolution to the local DNS server provided by systemd-resolved.

Then, enable resolved so that it is started when you reboot:

systemctl enable systemd-resolved.service

Finally, start the service so that it is available immediately:

systemctl start systemd-resolved.service

You will want it run those with the required permissions, e. g. via sudo.

Have you considered creating a macro in any image editor that supports macros and assigning that to a button / keyboard shortcut?

gimp certainly has macros and scripting features. Maybe this will help: https://www.gimp.org/tutorials/Automate_Editing_in_GIMP/

You can still edit a mask / selection with the regular UI, then trigger the cut/merge process you desire based on that selection.