Managing external identities to enable secure access for partners, customers, and other non-employees
@SvenGloeckner Have you tried looking into Microsoft Graph for managing Azure AD B2C policies programmatically if this helps to achieve you are looking for. This feature is currently in preview (beta version) using which you can create, update, delete or list Azure AD B2C trust framework policies.
You can also provide a product feedback on the same at Azure AD B2C Uservoice if you need any specific features related to Azure AD B2C so that community can upvote this feature request and products team can plan to include the feature in future releases.