It would be nice to have the ability to look at the list of participants who've accepted the meeting invite via the meeting reservation when I go to start the meeting. This would save a couple of clicks!! (Hey, it's a concept!)
Cisco Webex Meetings does not store the accept/tentative/decline status for Users.
The Webex app (formerly Webex Teams client) shows invitees’ acceptance status from the Meetings List when the user’s calendar has been enabled with Hybrid Calendar Service stored in Exchange, Exchange Online, or Google Calendar.