Hey! It's likely that your install isn't actually in your documents. On pc, the default install path is C:\Program Files (x86)\Origin Games\The Sims 4 or C:\Program Files (x86)\EA GAMES\The Sims 4 depending on whether you have origin or not. If you have a shortcut for ts4 on your desktop, you can right-click it and select "Open file location" to see where your game is installed.