→ → Applications Menu Extension
You want to use the GNOME Applications menu but see in Tweaks that the extension hasn't loaded and can't be enabled?
Open Utilities and Tilix
Copy and paste the follow...
sudo apt install gnome-menus
and hit enter. You'll need to type in your password and follow the prompts.
Once it has completed then reboot your Librem Laptop.
Once your computer has booted, go into Tweaks and you should be able to enable the Applications menu extension for GNOME.