Many vcxprojs under programs in a new UE game project created by source built editor

Hi,
I built the UE 5.2.1 from source, but I found it strange that when I created a new game project in the editor, it would create a programs folder and include 72 vcxprojs under it automatically.
It is very different from the launcher version editor, there is no such programs folder and vcxprojs in a new created game project which is created by launcher version editor.
Please help confirm if it is the correct behavior of the source built editor, or there is something wrong with it?
Thanks!