Open Id Connect connection- logout endpoint doesn’t get called as part of federated logout

We developed our own Identity provider on top of ASOS OpenIdConnect Server. We created the Open Id Connect Connection in auth0 for our custom identity provider.

Unfortunately, the logout endpoint of our IDP doesn’t get invoked as a part of the Auth0’s federated logout (https://{OurWebApp}.auth0.com/v2/logout?federated&client_id={OurWebAppcClientId}). There is no place to configure it inside Open Id Connect Connection settings(only Issue URL can be configured.). My issuer has data for end_session_endpoint like “end_session_endpoint”:“https://{Our Identity Provider}}/connect/logout”

Federated logout has some limitation, It does not support some IDPs. It is documented here: https://auth0.com/docs/logout/guides/logout-idps#federated-logout-support

What options do we have if we want to support federated logout for custom identity provider?