This issue was addressed in Thomas Hoving’s 1978 book “The Search for Tutankhamun: The Untold Story”.
Apparently with Lord Carnavon’s prior knowledge and approval, Carter did purloin some artifacts which he later sold to the NY Metropolitan Museum of art.
One of the more interesting things in the book was that Carnavon, his daugther and Carter actually entered the tomb the night prior to the official entry.
I had and read that book.