I am fine with it but I feel they should have alternatives.
Some people don 't have a device, connection. Or have issues with using technology for whatever reason, being old, incapacitated, etc.
If they don't have a good internet connection available for free for customers with a good mobile website, why would anyone visit and actually struggle through the ordering process?
It's a niche probably imaginary scenario they want to strawman. If a place has shit cell service or no Wi-Fi then they clearly aren't using QR codes and just shrugging their shoulders confused at every customer.
Then they don't eat there. I don't see the problem. Might be the owners problem. But hopefully it was taken into cinsideration. If not, though luck again.
That's not quite how accessibility regulations are structured. Wouldn't surprise me if there are requirements on this in any given jurisdiction. Perhaps not a 'thou shalt have printed menus' but some kind of reasonable accommodation I think isn't absurd.
I think it's pretty reasonable to require restaurants to spend a little money to print menus, and even a little more to get braille ones. There's millions of people who might have some difficulty or another using a browser based menu, certainly we can do better than saying "sorry, tough luck."