How do i find .desktop files in File Manager

I want my .desktop apps to be added in my Steam Library, like Minecraft but I can’t find them.

There are at least three locations which contain the .desktop files:

System-wide, non-flatpaked

/usr/share/application

System-wide, flatpaked

/sysroot/flatpak/exports/share/application

Per-User

~/.local/share/applications