Change the primary administrator

The primary administrator on our account has left, so it needs to be changed to me.

I see that in "Manage Team" and then "Licenses" there's Xs to "remove users from this license." Is that the way to do it?

I've read many related questions. They seem to all conclude that it's impossible to do unless you contact support.

Change the primary plan administrator

How do I switch the primary administrator role to another team member?

I need to remove myself as the primary administrator for a CC acount and assign to another administrator. How should I proceed?

Change Primary Administrator for Cloud Team

How do I switch the primary administrator role to another team member?