Thanks for reaching out. You can now access your end users from the main Support instance (not from the Admin Centre).

The "Settings > Manage > People" page is essentially being split, and to quote from this article -

The end users are managed on the Customer page. (In Support)
The agents and admins are managed on the Team members page. (In Admin Center)
Roles for all types of users are managed on the Roles page. (In Admin Center)
Organizations are managed on the Organizations page. (In Support)
Groups are managed on the Groups page. (In Admin Center)
Tags for users and organizations are managed on the Tags page. (In Admin Center)

We're working on some new features for this page, including filtering, better UI, and more.

Let us know your thoughts/feedback, we're keen to improve.