The supply the tablet/phone with the digital menu. Sushi places here do it, I'm ok with that. Making me use my own device, ehhh no thanks. I might as welp provide and make my own food too.
Well, your own device is relatively more hygienic to you, in comparison with shared device.
You may hope a restaurant will disinfect device after each guest, but it's safe to assume they're not.
Debatable...whens the last time you sanitized your phone. (Never...).
It is also possible to be too hygienic and actually making things worse for you and developing allergies, skin conditions, etc...
If you're really afraid of menus, then don't touch the door knob at the restaurant, or the seats, or the bottles of sauce, salt pepper shakers, etc....