Put a star link there, problem solved. That works pretty much anywhere in the world.
Why introduce new problems? I was bike touring and wasn't carrying a phone. Isn't that allowed?
I like being able to skip all of that. That works too. It's not that hard.
Regardless, I have global entry so I do appreciate the desire to skip a line, but I don't follow how 100% digitization solves the need for checkpoints completely. It just seems like techno utopianism to me.
Edit: It's convenient if you are a digital native, but elderly folks, among others, will not find it easier than a physical passport. The push to require everyone to have a digital device to participate in society is troubling to me.