@thisismissem @benfrancis My impression is that it's actually fairly easy to become an Invited Expert in most WGs, _except_ that you have to be confident enough to ask via https://www.w3.org/groups/wg/<group-name>/instructions/, or the Chair has to remember on their own.
I've sent https://github.com/w3c/charter-drafts/pull/598 to try to improve the IE situation.
As a self-employed CG-taskforce lead, there should be no doubt in anyone's mind that you should be an Invited Expert, and we should fix the docs to ensure that.