You can use any admin client tool (all qvm- commands) from admin client qube as long as the policy required for their function allows it. Which is really a subset of “you can request any qrexec service from dom0, which includes admin API by the way”
This is the audience for the proposed terminology amendment. “Normal” person will never get themself confused investigating the difference between “admin qube”, deprecated “AdminVM”, and “AdminVM” klass.