Personal Audio Call features

I recently purchased the PAC add on anticipating that I could do the following:

Have 50 people on a call via their landline or mobile phone. Have them on mute until they indicated to me (the host) that they wanted to ask a question ... by pressing a key  (eg hash or star) at which time they would become visible to me. I would allow them to unmute and they ask their question. Once done, I put them away and back on mute.

IOW like a Webinar where attendees use the Raise Hand icon to indicate to speak. But this does not seem to be the case with Zoom PAC ... ? Or am I missing something ?