Libhandy catalog not included in Builder Flatpak?
I asked this question about five days ago on the GNOME Discourse, since I was not sure if this is better be asked here or there. However, since I received no answer so far, I'm want to ask it here as well.
So, I recently switched my system from a regular Fedora Workstation to Fedora Silverblue, which means I now only run the Flatpak variant of GNOME Builder.
Today I wanted to use it to make a quick UI prototype with Glade, but I have noticed that the Flatpak does not contain the Glade catalog file for libhandy, despite it being quite relevant for the applications developed with GNOME Builder?
So, is this intentional? And is there a way to add the libhandy catalog for myself (ideally without needing to use toolbox for regular packages)?