OK, I have an initial Nix package of Bisq 2. I haven't gotten past the Tor initilization:

Perhaps it's a network issue on my side.
If you want to give it a go, run: nix run github:emmanuelrosa/erosanix#bisq2
If you have a 4K display, then you way want to use this:
$ nix shell github:emmanuelrosa/erosanix#bisq2
$ bisq2-hidpi
#nixos