Open up gnome tweak tool, go in the extensions tab, and on the "material shell", there is a little cog next to the switch. Click on it and there you have the av

Open up gnome tweak tool, go in the extensions tab, and on the "material shell", there is a little cog next to the switch. Click on it and there you have the available configuration options made available. Actually, this is how you can configure most shell extensions ;)