Question about Raspberry Pi 4 4GB Model B

Why are the expected delivery dates specified so precisely and then not met? I can understand that bottlenecks can occur at the supplier. But then under no circumstances should a delivery date be specified! Just write "delivery date unknown". My Raspi order is now the fourth in a row for which an exact delivery date was given (1.12.2021 in this case), but then one day AFTER the promised delivery the status was changed to "unfortunately the goods were not delivered to us". Do you have logistics problems in your warehouse?