There's reason to believe her tomb was found in antiquity (a gold scarab with her name on it was found on the Ulu Burun wreck), and moved, possibly to a cache of mummies analogous to the one near Deir el-Bahri (Theban tomb 320, or TT320); in the 19th century a bunch of grave goods from Nefertiti showed up in the markets in Egypt, suggesting that local yokel tomb robbers beat the archaeologists to the find. TT320 was found by robbers, but the robbers were discovered, arrested, and the cache (more than 50 individuals, including Ramses II) properly excavated and studied.
I saw Ramses I in a museum in Niagara Falls in the early ‘70s and then again at the Carlos Museum on the Emory Campus in Atlanta GA about 15yrs ago. When they realized that it was a royal mummy they gave it back to Egypt. The most amazing coincidence in my lifetime. Ramses I spent about 100yrs in North America and I bumped into him twice.