There are, in essence, two basic opinions about the period in which biblical archaeologists date the events of the Exodus an early date and a late date. This chronological issue is probably the most troubling in terms of the history of Ancient Israel. Few biblical scholars doubt there was something called the Exodus but there is no consensus as to its nature.
Many critical scholars are quick to reduce the significance of it.
They tend to look upon the material in the Bible as being rather expanded by the retelling - sort of like the fish story that gets bigger and bigger. Perhaps most biblical scholars, if not all, would admit that at least a portion of the people called Israel were in Egypt and left in some fashion they, at least, deemed miraculous. The latter placement depends on a shortening of the 40 years Israel spent in the wilderness. This should provide you with some idea of how their minds work. The chain of reasoning they employ has its basis in specific assumptions.