At a sit-down place, you normally give your card to the waitstaff once they bring the check/receipt. There’s no tap-to-pay terminal they bring to you.
You should not ever let someone take your bank card out of your sight! Where are you where this is accepted!?
That’s not how it works everywhere in the world. Most places you just pay with your phone or your card.
My brother in Christ you sound like you’ve never been to a restaurant with waiters. And regardless you also literally just said “Most places you just pay with your phone or your card” after asking how he would pay if he couldn’t use his phone. You literally already know the answer to your own question.
I’ve been plenty of restaurants just not the same restaurants you’ve been to honestly it’s like you don’t think that cultures change across the world.