There is no archaeological evidence establishing the tomb as Joseph's, and modern scholarship has yet to determine whether or not the present cenotaph is to be identified with the ancient biblical gravesite.

Where is Jacobs tomb?

In the final chapter of Genesis, Joseph had his physicians embalm his father Jacob, before they removed him from Egypt to be buried in the cave of the field of Machpelah.

Is there any evidence of Joseph in Egypt?

His acquisition of grain provisions enabled Egypt to withstand and survive the famine. The idea of a foreigner reaching the top of Egyptian society sounds unlikely and there is no archaeological or written record of a Prime Minister in Egypt called Joseph.