As of now it's possible to build for core22 but it uses the wrong plugs. The latest core24 is not properly supported.

Adding proper support for both would require different plugs setup on the snapcraft.yaml as well as likely workarounds depending on version, e.g. different extensions.

See https://snapcraft.io/docs/gnome-3-34-extension and https://snapcraft.io/docs/gnome-extension

Side-note: Currently, the default plugs are also not the proper ones if we account for using Ubuntu 20 as base (core20), So it's also probably worth to look into it. Related to #6976 (comment)

I'm preparing a PR to attempt to tackle this issue.

Similar PRs: #7320 , #7378