Several admins on single PC

Hello!
I have Zoris OS 16 setup with several admins and several users.
When users try to do something "dangerous" (like installing app from app center), Zoris asks for user with admin privileges. But Zorin asks only for the user first created when installation process, but I want Zorin to ask for any of existing admin (like Windows UAC). How to do that?

P.S.: and yeah, I know how to do that from terminal (su - username and do what you want), but my question is about Zorin's gui...