External ID login page not showing identity providers button to singin

Hi Everyone,

We are currently working with an ABC organization, under which I have set up an External B2C tenant for customer logins. For this, I registered an app in the main tenant and configured a custom Identity Provider (OIDC) in the External B2C tenant. This setup allows users to sign in through the main tenant along with other available options. We are using user flows to manage the login experience.

I have connected both the app registration and the custom IdP to the user flow, and everything was working as expected earlier. A few days ago, we were able to see the custom IdP button on the login screen (as shown in First Image).

However, for the past week, the custom IdP button has disappeared, and we are now only seeing the default sign-in page from the user flow (as shown in Second Image).

I’m unsure if this issue is on Microsoft’s end or if something has changed in our configuration. However, I’ve carefully followed the latest steps and best practices while setting it up. Any suggestions or guidance on resolving this would be greatly appreciated.

Thank you!