I think it doesn't have the NFC chip yet. Just the Bluetooth.

But there also seems something brewing - they just bought an identity/payment startup.

https://www.standard.co.uk/tech/oura-smart-ring-contactless-payments-wearables-b1081785.

It would be cool if they open it up for integrations. You could sign transactions, notes, get physical smart key accesses, multisigs, ...