Since science is an evidence based subject, an appropriate description for the lack of evidence is the adage which gained popularity in astrophysics “absence of evidence is not evidence of absence”.
This can be applied to Exodus where the lack of evidence does not disprove Exodus but runs into a serious problem.
Archaeological activity started in the Sinai in the early 20th century and has accelerated in recent decades.
This is the current status of archaeological finds in the Sinai.
There is a dearth of Late Bronze Age sites which corresponds to the Exodus time frame and those that have been found such as at Serabit-El-Khadem is an Egyptian temple and a turquoise mine used by the ancient Egyptians, but nothing that can be attributed to the Exodus.
What is even more significant are the archaeological sites found which predate the Late Bronze Age.
The archaeological evidence from these sites reveals nomadic groups which travelled in small numbers and lived in temporary campsites. Their small numbers with their livestock made them very mobile as they quickly travelled across the Sinai in search for more hospitable environments.
By comparison the Israelites all two million of them semi occupied the Sinai for forty years without leaving a shred of evidence which should have been much easier to find by the archaeologists than what was left by their predecessors.
The lack of evidence adage is a very flimsy argument for the support of the Exodus which also avoids answering the question how a large population could survive in an inhospitable environment.
Being a science forum miracles are ruled out.