Here is one such article among many if you do a search past the carson attack stories and back into the archeology discussions.
Might need to go back 10 pages or so...the attacks have been prolific.
https://josephandisraelinegypt.wordpress.com/tag/grain-silo/page/2/
There is a number of investigative pieces on Netflix that deal with the time lines..
Imhotep is NOT the Joseph of the Bible. Joseph's Egyptian name was Zaphnathpaaneah (Gen 41:45).
Furthermore, the step pyramid design is identical to that of the Babylonians, and all references to Imhotep in ancient Egypt have no relation whatsoever to Israel, but rather to pagan worship and architecture. Why would Joseph have anything whatsoever to do with such designs, and ones which were perfectly needless for keeping grain, of which he only had seven years to gather and store in vast amounts?
Lastly, the scripture does not mention pyramids of any sort, and simply declares that Joseph held them in the closest cities from whence they were gathered:
Gen 41:48 And he gathered up all the food of the seven years, which were in the land of Egypt, and laid up the food in the cities: the food of the field, which was round about every city, laid he up in the same.