I have seen bins that carry payment method to cashier and receipt/change back to customer. Cashiers wear masks and gloves. Is the bin cleaned between customers? Can they keep the registers clean? If so, there should be no issue for anyone.
Contact-less payment is good-- as long as everyone remembers how much they are spending. If you spend your little bit of limited cash and touch it, you might be more likely to know how much you spent and when you spent it. For some people, this is easy. For others, not so much.
My garden in England is full of eating-out places, for heat waves, warm September evenings, or lunch on a chilly Christmas morning. (Mary Quant)