Migrating from Auth0 to Azure B2C with a SAML connection

Question

Hello,

We are moving our identity services from Auth0 to Microsoft. In Auth0 we setup an authentication connection to be done via SAML. Our SAML provider is using SimpleSAML (not Active Directory). This was easy and worked great in Auth0.

In Azure B2C I believe we need to setup a Custom Policy to do the SAML authentication. Ideally, I would love to take the configuration that I have in Auth0 and simply map it to Azure B2C. However, I don't know where to start. The following document seemed helpful but it refers to a TrustFrameworkExtensions.xml SAML technical profile that I can't find --- I can upload a new document but I don't see a template that I can use.

Also, it talks about a self-signed certificate that we didn't need to do with Auth0. We setup an external identity in Azure B2B that uses the SAML endpoints does someone know how to take that and map it to a custom policy?

https://learn.microsoft.com/en-us/azure/active-directory-b2c/identity-provider-generic-saml?pivots=b2c-custom-policy

If someone has had some experience moving a SAML connection from Auth0 to Microsoft I would love to learn from your experience.

Can someone get me pointed in the right direction?

Thank you!