Quick tangent, what are the top apps you’re missing? Also, if you’re comfortable adding random channels to your system, maybe you can find more packages here: https://toys.whereis.social/ (Also, Flatpaks work in Guix.)
I also have a hard time finding the actual code or documentation. The best luck I’ve had so far is to check codeberg directly or grep through the local checkout at ~/.cache/guix/checkouts/.
guix package…guix home
I could be totally wrong here, but this is triggering my spidey senses. I don’t think these two systems share anything. So anything you install with guix home won’t show up if you do guix package --list-installed and I’m guessing nothing is connected the other way either. My gut tells me you should use guix package XOR guix home—and it probably should be guix home for persistent desktop stuff. Ok, there’s a 3rd isolated option: guix shell + manifest.scm for dev tools or just guix shell pkg for temporary stuff.
Maybe you need guix home reconfigure -L path/to/custom/locale/thing home.scm? It would probably be helpful to post the actual command and error you’re seeing.