It’s a lump of rock in a landscape that is a lump of rock, just like every other lump of rock in that same landscape. They are unremarkable. Mount Seir was identified by Charles Beke as Mount Sinai in the second half of the 19th century, but the location of Mount Seir also varies. Beke identified it as Jebel-e’-Nur in Arabia, but he was looking for a volcano (he was of the school of thought that Sinai was a volcano, hence the pillar of smoke by day, fire by night) and Jebel-e’-Nur wasn’t one.
https://www.google.com/search?q=Jebel-e%27-Nur
interesting
lots of guesswork involved