Photos would definitely be good if you could find them. I don't think I've ever seen those here in the US.
Turns out that more restaurants support contactless than we think, it's just that it's pretty much only for physical cards as it's the employees tapping for customers. You can tell they tapped for you as the receipt will say something like "Visa Cardholder" or similar instead of your name.
It's still not ideal, mind you, but it's not a simple matter of a significant portion of the US economy deciding to permanently be insert-only for reasons. If it were, I imagine there actually would be a contactless mandate eventually. As it is, from the perspective of Visa and MC, as long as physical cards seemingly "work", who cares about any of the other form factors?