I have been reading about the lack of physical evidence supporting the exodus narrative (and after where the Israelites are living in the Sinai desert), and some difficulties raised with looking in the Sinai desert for evidence are:

1. since the desert is not static and the landscape changes a fair bit over time, as well as water reserves potentially drying up etc. It is hard to track the movements of the group as described via descriptions of landmarks in the bible and related texts.

2. the Israelites would have been poor slaves with almost no material possessions beyond what they could carry on them as they left, so the physical record of their time in the desert would not have been as significant, especially not since they were nomadic, and so traces of their activity would not have had the chance to accumulate like it would have in an established settlement.

I'm just wondering about what evidence we should expect to find if a population of 1500000+ lived in this region for 40 years. Given the lack of material possessions etc. Is there anything in particular a group like this is completely expected to leave behind that archeologists would be on the lookout for, but never found?

And finally: are there any similar scenarios that do have archeological evidence to refer to, and what did it look like?

edit: I originally put 600000+ as the figure for the amount of israelites, buit forgot that it was counting only men, so I upped it a bit to account for women and children