Custom content not showing up in game?

via in-game settings, make sure you have 'Enable Custom Content and Mods' checked ✓ . (You should see it under the Other tab in the in-game settings) Quit the game after selecting Apply Changes and then launch the game again for these changes to work.

This guide should be up to date: https://www.carls-sims-4-guide.com/tutorials/mods-cc.php

Yes I've already checked that, it still doesn't work 

@rhianna0811 

You probably didn't put them in the folder the game uses. Here is an easy way to find out which folder your game is using: https://sims4.crinrict.com/eng/2018/07/how-to-find-your-user-folder/