John Gill Commentary Acts 7:15

"And Jacob went down into Egypt; and he died, himself and our fathers;" — Acts 7:15 (ASV)

So Jacob went down into Egypt
At the invitation of his son Joseph:

and died, he, and our fathers ;
both Jacob and his twelve sons died in Egypt, though we have no account of the death of any of them, but Jacob and Joseph, particularly; only in general, that Joseph died, and all his brethren, and all that generation, (Genesis 49:33) (50:26) (Exodus 1:6) the Syriac version adds "there", that is, in Egypt.