I would like this very much also, as there is ”one client to rule all your libraries” even for cataloguing games*.
I've only recently today found a JS script for getting a list of your games from HB. Yet it requires to be run in the browser console which is not safe if you don't know what are you doing.
If I'll manage to cobble up something I'll post it here with the appropriate caveats.
* there is Playnite, but require itch, Steam and HB apps to be installed, which only increases the bloat