Actually the Egyptians were following ancient historical styles of recording history.They would never record their failures or humiliations. The Pharaohs would not put up with it.Many battles that they lost they would record as a victory......The Torah is one of the few records that includes both.The Jews recorded victories and failures.
It is very odd that there the Egyptians have no records of first born children during that time .Recently archeological digs have uncovered evidence of 600 stables for chariots in the vicinity of the Reed sea.The Reed sea could be the Red Sea mentioned in the King James Version of the Bible. I don't believe the spelling of English words then was standard until the first dictionary was written.A word could be written with several spellings.
No records of first borns is just silly. Where do you get such ideas?
Of course the Egyptians used chariots and very likely had some posted on the main route to the Levant. So?
The Sea of Reeds substituion for the Red Sea is one of those attempts to demystify the Bible. It's a swampy area which perhaps was passable in ancient times.
The Jews recorded victories and failures.
Which lost battles are recorded in the Torah?