Ticket and guest-list check-in is currently handled in the mobile app.
iOS
Tap Scanner to scan a ticket QR code.
If needed, go to Admissions, open the guest, then tap Check In.
Select counts and tap Save, or tap Check In All when everyone arrives together.
Android
Android follows the same ticket and guest-list check-in flow as iOS.
UI details may vary slightly by device, but check-in behavior is the same.