When can the US group take-out booking merchants see it?

The notice of the Meituan takeaway pre-order merchant system can be seen. Inquiring about the relevant information shows that the designated time of the US group's takeaway will not be done in advance, but will be started after waiting for the rider to take the order. Theoretically, the customer's order should be delivered at the specified time, and the system will inform the merchant that there is an appointment form, but the merchant can't see the specific order content for the time being. It's almost time, the system will unlock, the merchant will see the order begin to be made, and the rider will also see the order begin to be collected.