Log in to your Schedly account
Open the event type from the app.schedly.io/event-type
page and click on -> Advanced tab
Enable the toggle that reads Requires Confirmation
From here, -> Select Always if you want it to be an event-type that requires confirmation at all times -> Select When booked with less than {{ num }}
{{ time }}
notice to only make it an opt-in event type when a booking is made within the selected/configured time-frame.