Hi,
using Keycloak as an identity broker is when you configure keycloak to delegate the identification to a another IdP (as explained here https://www.keycloak.org/docs/latest/server_admin/index.html#_identity_broker).

It seems it's the reverse that you want.
If this is the case then you just have to register an OIDC client for the IdP to be able to forward authentification request to keycloak .
See https://www.keycloak.org/docs/latest/server_admin/#_oidc_clients

hope this will help

ُThank you so much for trying to help me here,

What I want is the identity broker option, however, the Idp that I delegate the identification to is not following the OIDC standard as is,
he is using some of the standard parameters and some custom ones of his own so I want to forward these custom parameters to him.

Thanks again

FYI, not moving up, found you on page 3