IAM policy listing that returns v1 and v2 policies in full

Problem:
GET /v1/policies?account_id=...&type=access lists a policy created with POST /v2/policies (for example one with a time condition) as a placeholder: subject iam_id "unsupported version", one role "role:UnsupportedVersion" ("This is a unsupported policy version placeholder, to view the full content, please call GET with provided href"), only accountId as resource, and an href under /v2/policies/ID. GET /v1/policies/ID answers 404 for it. To see every policy of an account, a client has to list v1, detect the placeholders and read each one again through v2.

Use case:
We audit and operate client accounts from our own tooling: list every access policy, show who can reach what, review changes. Every placeholder costs an extra call, and a client that does not know about the placeholder silently misses conditional policies - exactly the ones that need review.

Request:
One listing endpoint that returns every access policy of the account, v1 and v2, in full (subject, resource attributes with operators, roles, conditions), with the same paging.