Cores are not appearing on Steam using macOS

I’m running macOS Ventura (13.2.1) and I’ve installed RetroArch from Steam. I’ve also enabled mGBA from the DLC list.

However, when I launch RetroArch and select [Load Core] it says “No Items”. If I select [Load Core] -> [Install or Restore a Core] it also displays “No Items”.

If I select [Manage Cores] I can see a list of available cores and if I select [mGBA] it displays the [Uninstall core] option so it appears to know that it’s installed.

Is anybody else having this issue?