Pelusium at Mouth of Dried-Up Pelusiac Distributary of Nile River Built After Ice Age so Canaanite Ruins Offshore?

The great ancient Egyptian port city of Pelusium at the mouth of the now dried-up and furthest east Nile distributary (the Pelusiac) of the delta was begun built circa 1300 b. c., there on the Mediterranean Sea shoreline after the Ice Age (when the Pelusiac distributary still flowed but in ever decreasing volume), so surely there are structures built during the Ice Age to be found on the seafloor offshore Pelusium, built when the Pelusiac flowed strong, when the sea level was a few hundred feet lower.