Keli
Just a guy ;)
This reminds me of Starship Troopers.
You should look into OCIS. You can set it up in minutes and it’s really fast compared to Nextcloud for basic file’s stuff (share, sync, stream, photo auto uploads).
Maybe you should give Ubuntu Server a spin. Last I tried, Nextcloud snap was the easiest way to get Nextcloud up and running.
I don’t think it’s something you can fix unfortunately. Just use something else like Connect or Liftoff while waiting for the admins to update their instance.
DivestOS is the only Android ROM I know of that integrates the Mulch webview. But Tad (DivestOS dev) also builds standalone binaries of Mulch that can be installed independently- just add their repo into f-droid or something like droidify and you’re good to go. Link: https://divestos.org/fdroid/official