In this case, you can contact the seller and ask him to check what happened. Generally, the seller may have filled in the wrong courier number. In this case, the number cannot be changed for more than 24 hours, and the seller can only give the number privately for the buyer to check. It may also be that the courier company missed the order. In this case, the seller needs to urge the courier outlet.

Maybe the seller just filled in the order number and hasn't handed the goods over to the courier for transportation

Maybe the courier company is on holiday and is short of staff. After receiving the package, there is no time to scan the code and enter the information, which will also lead to the state of no logistics information