Direct federation with OpenID Connect IdPs
At this time, direct federation in preview can be set up with any organization whose identity provider (IdP) that supports the SAML 2.0 or WS-Fed protocol. Please extend this to OpenID Connect IdPs.
Tom Schulte (Plex Systems) commented
This may be a duplicate of or have overlap with https://feedback.azure.com/forums/169401-azure-active-directory/suggestions/32973442-third-party-initiated