clientMetadata
OIDC SIOPv2: OPTIONAL. This parameter is used by the RP to provide information about itself to a Self-Issued OP that would normally be provided to an OP during Dynamic RP Registration. It MUST not be present if the RP uses OpenID Federation 1.0 Automatic Registration to pass its metadata.
OID4VP 1.0: OPTIONAL. Authoritative data the Wallet is able to obtain about the Client from other sources, for example those from an OpenID Federation Entity Statement, take precedence over the values passed in client_metadata.