Muse Sounds are not discovered

I currently have the MuseScore 4.0 Flatpak installed. I have downloaded the muse-hub and Muse Sounds, but the sounds are visible only in AppImage version.

I had a look at the PR comments with the 4.0 update – yet I expect it is a highly important feature and it would not be good to give it up easily.

I'll leave this issue here. It would be best if the Flatpak maintainers could reach out to MuseScore developers to find a way to discover the resources from muse-hub.

Currently even if I grant permissions to all files via Flatseal, Muse Sounds are not discovered.

Also: I believe that as we have this (unfortunately closed-source) Muse Hub thing, creating another flatpak of it might be the good idea.