Has someone tried to give password managers (browsers own password manager, keepass, bitwarden, …) a hint, that
keycloak.idp/realmA and
keycloak.idp/realmB
have different credentials and should be stored that way.
Advanced users are able to select the correct match-criteria themselves, but for less experienced users a server-side hint would be a nice feature.
There might be no option on the password managers side to recieve such a hint, but maybe someone already has a solution for the problem.