2.5 million Israelites roaming the desert for 40yrs during Exodus must be like a floating island and must be noticed by other tribes - Are there any records from these other tribes?

Answer 1

There are no records at all found to date from these other tribes, and so there is obviously no record of the Israelites in terms of writing. There is however, in the archaeological record plenty of evidence which supports the historicity of the Exodus event. Modern archeologists have also noted the existence of what they term as 'invisible nomads' which we know from other sources to have existed historically but which have left no 'archaeological footprint' or records themselves, even in relatively recent times. In this light the absence of records is not surprising. Perhaps the adage 'absence of evidence is not evidence of absence' applies here.