Their distribution method for Ubuntu is a bit unfortunate, I'm not sure I will install another package manager (flatpak?), give it root access, and then trust an unknown source (flathub?) just to try a software.
I thought there was a debian build, however feel free to post sth to in the github issues, I did so quite a few times already and at times the issue I had was fixed within 24 hours.
It's up to each distro to package things. You could probably open a package request with Ubuntu. I've done this for Guix and Nix many times.