The notion that “no sarcophagus were ever found in the pyramids” is a bit of a myth. They have been found in some pyramids, just not in the largest and most famous pyramids, as those pyramids were completely looted when they were opened by modern researchers.
There of course is the “granite coffer” in the pyramid of Cheops also, which would be about the right size to contain a sarcophagus, but we found it empty after the graverobbers got there first.
When you say ‘we’ do you refer to archaeologists in general or were you one of them?
One can only imagine what had been removed.