Myths are stories based on some truth. Gradual movement of tribes is purposed by Alt, and then advanced by North. Most take this view. There is debate over the date of the Exodus. There is the early date of the exodus which early writers espoused or the late date of the exodus in the time of Rameses II or later.
Most archaeologists take a late date for the exodus.
The key archaeological evidence is the Merneptah Stele. History Petrie the father of modern archaeology. He was some what eccentric. Petrie believed that the Great Pyramid was the key, so he wanted to check its measurements. No one was allowed to measure, so Petrie dressed up as a ballerina.