Microsoft Graph: Get infos of all licenses from all domains managed

Question

I'd like to ask if anyone knows if Microsoft Graph give us the possibility (even if beta) to get all the licenses from the users in all the domains I manage in my partner portal.

For now I use : GET /users (beta) + GET /subscribedSkus to get a list of all the licenses from my domain.

But the thing is that I manage more domains than mine for my customers with the partner portal and the info that matters for me is their data.

Is there a way to get this data without having to login with each of their admin accounts ?

Example:

my domain, smth@ssss .onmicrosoft.com (Partner) (3 Users)

customer domain 1, smth@customer1.onmicrosoft.com (15 Users

customer domain 2, smth@customer2.onmicrosoft.com (32 Users)

customer domain 3, smth@customer3.onmicrosoft.com (8 Users)

With Microsoft Graph, I'd like to login with my smth@ssss .onmicrosoft.com and get the info of the licenses of all the domains I manage (58 Users). But right now I only get the info of my own domain (3 Users).