Hello @testuser7 and thanks for reaching out. Azure AD app registrations are meant to support OAuth2 and OIDC while applications created as enterprise apps are meant to support SAML. That being said, you can do OAuth2 and SAML in some applications. In fact, I'm doing it right now using the Azure AD SAML Toolkit app, but keep in mind there's no specific documentation for the latter scenario and thus there is no (specific) support for it. However, nothing stops you from trying :)
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