Why is Custom API Authentication not supported on a OpenAPI resource type?

Is there a reason why I cannot authenticate an OpenAPI resource with Custom API Authentication? It allows for "API Key Auth" but that only stores an encrypted value on the Retool server and uses the same value on every request used on the OpenAPI resource. I need for users to be able to authenticate and for their Authorization header value to be unique to the user. The value is a JWT with a short lived expiration time.

Custom API Authentication is supported in the REST API resource type.

I was notified via chat this this was on the roadmap and the Rest API Resource is the correct work around.