In the UK it has become very common to need to scan a QR code on your table to order at a restaurant, which takes you to a website.

Most certainly you can still order at the bar the old fashioned way, but since COVID, physical menus have been removed, so how is your group meant to decide what it wants to order before one of you goes up on its behalf? (You cannot all go up if you want to hold the table.)

I don't even particularly mind the experience of using the website; the interface enables the display of all ingredients & allows you to specify allergens they need to avoid. If the kitchen runs out of an item, they can mark it as unavailable in the webpage. Finally, fighting to order at a busy bar was never a fun experience to begin with (it is the norm in non-fine-dining experiences in the UK to not have your order taken at your table.) But, this does require you allow arbitrary internet access on your device, which complexifies the blocking situation.

Yes it's exactly the one-off situations like that, which aren't super often but occur enough to greatly inconvenience someone without a pocket browser.

That totally makes sense!