I don't know if it'll help others -- I personally still haven't fixed the collabora issues. However, I did find out for some reason beyond my current understanding that the command Spaceinvader showed in his Tailscale Nextcloud AIO video doesn't work for me anymore. As such I instead used tailscale serve -bg --https=443 http://localhost:11000 which ended up doing the trick which came from this thread of comments on reddit Again if anyone else can figure out how to handle the what I assume is a routing issue -- nextcloud can't actually find Collabora because we're directing it to the same served domain from Tailscale which has already been redirected to the main installation of Nextcloud. Then it'd be greatly appreciated.