Seeing registrants after uploading a CSV

I’m hosting a webinar that is limited to approved participants. I’ve set the webinar to manual approval, uploaded a CSV of approved participants, and unclicked “Send invitation after importing” so they won’t receive any message. I will then include the webinar registration link to that same group in a separate email I’m sending so that if they register for the event, they’re pre-approved.

However, I don’t see a way to tell which of the uploaded invitees has manually registered. The entire list is under “Approved” when I look at Manage Attendees, and when I download the CSV of attendees it just lists everyone together as approved registrants, whether or not they’ve manually registered for the event. Is there any way to see who actually clicked through and completed the registration link? Or, once I upload a list, can I only see the entire list of pre-approved participants, whether or not they’ve manually registered?