Tipping in stores is a thing now?

It is pretty common to be prompted to tip by the PoS system in any place you can buy made-to-order food. This includes stores that are normal retail stores but also have some sort of made-to-order food. Like a fancy wine shop or gourmet food store that also sells sandwiches. But this isn't really a new phenomenon either. It's just that there used to be a tip jar sitting by the register, but now the PoS system prompts you because nobody carries cash anymore.