If the same void package exists in the nix os repo then sure. You can’t use a void package in nix os is the thing I would like to point out other than using distrobox.
I wouldn’t compare void and nix since both of them follow very different approaches. Void is more like a traditional distro while nixos on the other hand uses configurations for setup.
And no you can’t use void on nix os as said above. Hannah Montana linux and kubuntu uses Ubuntu as the base that’s what he meant.
It’s fine for the most part. Just keyboard shortcuts won’t work in default and theming is slightly difficult. You have add extensions to gnome to increase functionality.