How to configure SAML based SSO with Azure AD B2C as IDP

I have very little knowledge of how B2C works. I'm trying to achieve the authentication via SAML. I'll explain my question using a use-case.

I have an application developed using Adobe AEM and in B2C wanted to configure SAML-based SSO with Azure AD B2C as IDP. Is there any step-by-step approach or documents/links to achieve this? I tried to find the MSFT official document, but bit confused about the authentication flow and the overall approach. IS there any way to accomplish this without a custom policy?

Note: In B2C, "identity providers" do not have SAML.

You have to use custom policies.

The reference is here.

The flow is:

• The application creates a SAML AuthN request that's sent to the SAML sign-in endpoint for Azure AD B2C
• The user can use an Azure AD B2C local account or any other federated identity provider (if configured) to authenticate
• If the user signs in by using a federated identity provider, a token response is sent to Azure AD B2C
• Azure AD B2C generates a SAML assertion and sends it to the application