So I took a look inside the exe again in 7z and all the other data files have ".edata" or ".reloc", just the file extensions, but the only one that didn't have a file extension was the PCK file. If I recall correctly, the PCK file holds the important data for Godot games. Without the extension, the executable file won't be able to find it in some systems for some reason. I tried to rename it to add the . extension but I couldn't do it without making the program unable to be opened at all. This is all speculation but may be a reason as to why.
