If you are the Organizer for an event, you will be able to check who has registered for your event through the Event Dashboard > People > Registrants tab.
Here, everyone who has a ticket assigned to them will be counted towards your registrations.
You may see some with the status "pending acceptance" for those that purchased tickets via the bulk checkout option.
Note: If attendees registered for your Event before 2022 you may still see some registrants with the status "pending acceptance" that could be connected to the previous "Guest Checkout" option, too.
Here, you can also access your waitlist, refund and block registrants, and download your registrants report.