If they are generated ad-hoc by members of the public and agreed to not by coercion. In the case of the UK open banking initiative, it was largely a collaboration between large banks and some fintech providers after being mandated by parliament. Hardly the Linux mailing list or a Python enhancement proposal.

edit: Not sure why I'm being down-voted. If you believe that government created and mandated "open protocols" are really the same as decentralized protocols, imagine what it would be like if the US government forced every major institution to use the backdoored Dual_EC_DRBG they created instead of a sane cryptography protocol. A government enforced "open protocol" is not open at all if you're forced to use it.