How do become a meta/Facebook BSP

We have a messaging platform and want to add whatsapp as an integration option. However the integration flow is extremely poor especially for none technical business owners, we have seen that many other platforms have a "login with facebook" embedded option (https://developers.facebook.com/docs/whatsapp/embedded-signup ) that helps with the integration, seems you need to become a BSP for that. I've been trying to get in touch with someone about it but no help. Does anyone have information or guidance?