Are you finding mods are missing from your game? One of the reasons can be that the game cannot see any mods buried within folders. If so, that will be because your resource.cfg file is either incorrect, or missing completely from your Documents\Electronic Arts\The Sims 4\Mods folder.
Open a text editor such as Notepad and copy the following text into it
Priority 500
PackedFile *.packagePackedFile */*
.packagePackedFile */*/*
.packagePackedFile */*/*/*
.packagePackedFile */*/*/*/*
.packagePackedFile */*/*/*/*/*.package
Change the Save as type from Text to All files:
