Pharaoh's army was swallowed by the red sea, which would leave Egypt extremely vulnerable to invasion and chaos. Can anyone tell me what happened in Egypt after they suffered such a great loss? I cannot find anything on this topic whatsoever.
Well there's a good reason you can't find anything about it! If the Hebrews actually ever lived in Egypt, it wasn't anything like the story in Exodus. Here are some previous answers that may be helpful:
"The reality is that there is no evidence whatsoever that the Jews were ever enslaved in Egypt." This article states that to be true... is it? What are the historical roots behind the Jewish Exodus from Egypt then? by u/lbreinig and u/Flubb
Was the Exodus real? by u/Antiquarianism