Forward Auth & Authorization Bearer with Keycloak

I'm trying to get forward auth to set an Authorization Bearer id token using keycloak. I'm successfully using forward auth with funkypenguin/traefik-forward-auth in auth host mode. I get a _forward_auth cookie with what I assume is a session token or something similar and that traefik-forward-auth probably has the id token in memory. I don't see how to get it to pass the id token back in the Authorization Bearer header and then use that.

Anyone have this experience or guidance that may help?

Thank you,