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De-googled contactless payment?
(lemm.ee)
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There are other payment solutions. I have never used them and do not know how widely they are accepted. Maybe Paypal, Venmo, and Square have POS solutions. I do not think they are NFC. Maybe QR-code based? This is from memory. Maybe someone else knows more.
But yes beyond the ones people talked about, crypto, and the three I mentioned I am not sure there are any others in the US.