Document delivery information is blank after issued

Hi ,

Hi my name is Anil. I completed my interview on 8th November,2021 at delhi. I got accepted my visa at that only. But my passport was not arrived till now. Showing as “Document delivery information blank”. It was completed two weeks by now but no response. My ceac status also issued at that time.i kept premium delivery to my home. Any idea ? What’s going on?