Custom policies are not required to create a B2C app registration. Please visit the following links:
- User flows: Add the Azure Active Directory identity provider
- Custom policies: Set up sign-in with an Azure Active Directory account and Set up sign-in for multi-tenant Azure Active Directory.
- MS Graph:
- Applications operations. And also:
- Identity providers (user flow) operations.
- Custom policies operations.
- Policy keys operations.
msal-angular fully supports Azure B2C.