My project's solution has 49 projects, and Errors in the engine code

Hey, basically, when I open my .sln file generated by ue5, the solution shows having 49 projects, and I feel like that’s a little excessive, does anyone know why there are so many?
the other issue I’m having is code from the ue5 engine is showing errors, specifically in the stringview.h and archiveProxy.h files (or I think those are the names). These errors don’t stop me from running my project, and don’t seem to be causing any errors for me, but I’m just confused as to what they are and why they exist? as well as how I might be able to fix them? I’ve looked at the same project built on a different system, and that one doesn’t have the errors, so I’m just wondering why it happens on my machine but not others?