All screen guard working well but Glass is not working fingerprint but here link to purchase uv glass and he clame fingerprint working well. I am not tested purchase or not only your risk... https://glazedinc.com/search?type=product&q=S21+ultra+
I'd recommend Gadgetshieldz screen protector which I've been using for months and there was no fingerprint sensor issue, also the touch response is not affected. It protects the display from scratches all around the edges.
