To be honest, I can't remember what I filled in the "application" field. But I don't think that it was "aerospace", "nuclear energy", "military" or similar sensitive field.
I again contacted Digikey customer support and now at least I know the reason "The order has to be reviewed for necessary export information." Unfortunately, the team is not in office during weekends and the customer support will send an email to the team to urge my order. Do they really communicate about customer orders via emails or is it a joke?
UPDATE: After another hour, I received "PO Acknowledgement for Digi-Key Salesorder". So obviously the team was in office
These are their notes in the "PO Acknowledgement"
09-JUL-2024 07:06 ABG3 RECEIVED W/C FROM JOHN SMITH FOR ORDER STAUS INFRM THE S BEING REVIEWED BY THE INTERNAL TEAM. ONCE THE VERIFIACTION IS DONE WE AILL
PROCESS THE ORDER.
11-JUL-2024 07:29 AAVY JOHN SMITH W/C ABOUT ORDER. REPLY BEING REVIEWED BY THE INTERNAL TEAM
13-JUL-2024 13:35 A8GZ RECVD W/C FRM JOHN SMITH FOR STATUS. JOHN IS VERY UPSET ORDER HAS NOT SHIPPED.