SimpleTix, you can connect your Zoom account directly with your event site so your attendees on the event site would automatically sync with the attendee in your zoom account.

What also you could do is make one event time on SimpleTix but connect it with multiple zoom sessions. This is useful when you are selling one ticket for multiple zoom sessions.

Please check the following video on how to.
WebHook in USE: https://webhooks.simpletix.com/library/FixWebinars/RegAttendeeForExtraWebinars.aspx