A PID Provider SHALL include its PID Provider access certificate in its
Client metadata used in the common OpenID4VCI protocol defined in ISSU_01.
however, the Credential Issuer is a Resource Server that can be also an Authorization Server, even if not necessarly, and in any cases its metadata are not supposed to be Client Metadata, since the client, during the issuance flow, is represented by the Wallet Instance.
In https://github.com/eu-digital-identity-wallet/eudi-doc-architecture-and-reference-framework/blob/main/docs/annexes/annex-2/annex-2-high-level-requirements.md, ISSU_22
we read
however, the Credential Issuer is a Resource Server that can be also an Authorization Server, even if not necessarly, and in any cases its metadata are not supposed to be Client Metadata, since the client, during the issuance flow, is represented by the Wallet Instance.