I’m given to understand two things which raises questions before we even begin to look for evidence.
firstly, during the era the Israelites fled Slavery, Egypt had a vast empire which stretched right through Canaan all the way to modern day Iraq.
So effectively the Israelites fled Egypt to......Egypt.
secondly, if the Biblical figures are correct for the number of Israeli slaves, if they marched 5 abreast the last slaves would be leaving Egypt when the first slaves were approaching the promised land (I have not verified this myself but given it was only 9 days away by chariot, it’s not beyond the realms of possibility).