I’ve not used it as FTP as it wasn’t built for that. It was, however, brilliant for messaging. In regards to some comment below about the domain - you could always spin up a little unbound instance (+wireguard for your own stuff everywhere).

I’ve set up an XMPP server a few years ago. It worked beautifully!

Try installing the newest kernel available as that’s where hardware support comes from. Since you’re on an Ubuntu based distro - you could use somerthing like ukuu. Or just switch to a more rolling release type of distro.