AuthenticateCallbackHandler not supported with SASL_OAUTHBEARER_INHERIT credential source

[spike83]

For the Kafka client I'm using the following setting.

sasl.login.callback.handler.class=io.confluent.oauth.azure.managedidentity.OAuthBearerLoginCallbackHandler

With this I can provide a token e.g. for a Pod Identity in Azure. But when I want to configure the schema registry to use the same mechanism this seems not to be picked up.
See repos here: https://github.com/confluentinc/confluent-oauth-extensions

The docs state that SASL_OAUTHBEARER_INHERIT should pick up the same oauth configuration as Kafka

To inherit the OAuth configuration settings from your Kafka configuration, add the following configuration settings to your Schema Registry client:

bearer.auth.credentials.source=SASL_OAUTHBEARER_INHERIT
bearer.auth.logical.cluster=<lsrc-resource-id>

from: https://docs.confluent.io/cloud/current/access-management/authenticate/oauth/configure-clients-oauth.html#client-login-callback-handler-top-level-configuration-options

For the moment I think I could just re-implement it as a CustomBearerAuthCredentialProvider. But I think the expectation on SASL_OAUTHBEARER_INHERIT should be that this would work without and also picks up the implementations of AuthenticateCallbackHandler from the Kafka client.

Or did I miss something?