Found my old post on the same subject.
www.joomlapolis.com/forum/149-usage/228775-custom-fields-in-cb-registration-admin-email#260038
Hello,
I am still on 1.9.x and had to move to a new host, in that move I lost where to edit the email that gets sent to admins that alerts them to a ACTION REQUIRED! New User Registration Pending Approval.
The email gets sent but it has basic information in it, would like to add the registration fields into that email so the admin has all the details.
Thank you
Patrik