Valentin, please clarify, would you like to link the client’s request to the postal worker’s request?
then, perhaps, you can help you to create an invitation to the postal worker to create a process for the postal worker
https://prnt.sc/w39pvyand then - change the status of linked products to
https://prnt.sc/w39uia, so that you can automatically switch the client's request to the status you need - then you won't be able to look into the functionality of the checked-in arrivals (which, obviously, is what you need).