Currently attempting to use other distros/OS on Marlin, it's been tricky through fastboot & twrp but despite me messing around with both a/b partitions... I managed to just flash the original image again

It's a treble compliant device with latest update being Android 10, is there anything that can simply be flashed from twrp? I don't mind wiping the system partition from both slots. My phone has a faulty battery anyway and im pretty much fine with the risks