@Secretglittergal 22 GB is about the right size for the Sims 4 base game, while adding all current packs raises the size to more like 60 GB. So if you have some but not all packs installed, 35 GB may be accurate.
For the two listings, it's possible that you removed the EA App version of Sims 4 without also removing the associated registry entries, and that's the second copy you're seeing. If you can't find a second full install on your computer, it's not there and you can ignore the duplicate entries in your screenshot.
Removing this registry data is a dicey prospect, since deleting the wrong entry can prevent an application or even your whole computer from working properly, so it would be best to use a tool like Piriform's CCleaner to do the work for you. Or you can uninstall the entire game and everything tied to it with Revo Uninstaller, then reinstall the one copy you want to keep. In that case, change the name of the Sims 4 folder in Documents > Electronic Arts first so it doesn't get deleted too; this folder holds your saves and other user data.
The free versions of CCleaner and Revo are both fine.
If you'd like to search for that possible second copy of Sims 4, open a File Explorer window, click This PC in the left panel, and enter TS4_x64 in the search field. You should only see one copy, located wherever the game is installed. You can also search This PC for other files in that Bin folder (GraphicsCards, GraphicsRules, etc.), in case your second installed copy of Sims 4 is incomplete.