I wouldn't believe so no. The 3 data collectors it supports is Azure, AWS and GCP, the name is a little bit confusing. The solution would get the users from the core Entra tenant but it would only manage the permissions for them within Azure.
I don't believe this would work at all in B2C as you can't make azure subscriptions within the B2C directory, you get sent back to the root. Also, Azure AD B2C doesn't support PIM as I found out :)
Lovely John Saville video to go through it.
https://www.youtube.com/watch?v=lWUV4KZNzIkHope this helped.
