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Here are some documentation links that can help you set up Azure AD as a Service Provider for SAML SSO and explore OIDC SSO options:
Microsoft Entra single sign-on (SSO) integration with ADP (OIDC) - This guide provides steps to configure OAuth/OIDC federation setup.
Add an identity provider to your Azure Active Directory B2C tenant - This article explains how to configure Azure AD B2C to allow users to sign in with credentials from external identity providers.
Set up sign-up and sign-in with SAML identity provider using Azure Active Directory B2C - This documentation shows how to enable sign-in with a SAML identity provider user account.
These resources should provide you with the necessary guidance to set up Azure AD as a Service Provider for SAML SSO and explore OIDC SSO options.
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Thanks
Deepanshu