There's a qr code on the door or the table with a link to the menu that you view on your phone!

The QR code is just a url that points to the menu, so you can load it on your phone.

No, just opens a webpage with the menu.

So not to need physical menus, due to Covid.

If it is the same that other restaurants I know, you scan the QR code to access the web page with the menu of the restaurant.