This video explains the major 2 views on the length that Israel sojourned in Egypt from Jacob's 130th year to the Exodus in Moses' 80th year.
The 215-year difference dramatically changes what Egyptian dynasties that the Patriarchs would have interacted with and the Pharaoh that Joseph potentially served under.
Both views are advocated for by scholars, but this video will layout both views and display which one holds more to the Biblical text.