I'm Missing Sims 3 Content

@CariY2206  That location is fine, and wherever you install Sims 3, your packs should be in the same folder.  I'm not sure what's going on here, and I'll flag this thread to someone from EA to take another look in case it might require a conversation with support.  There are some issues that can't be solved on the user side, and they're not always easy to identify.

However, it'll take a couple days to get a response since people are off work for the weekend.  In the interim, I would suggest another clean install, except with three extra steps:

• Create a new admin Windows account which you'll use to reinstall the game.  Make the account local, as in, don't link it to your Microsoft account.
• Create a new folder on the root level of the drive of your choice, for example C:\Games is fine, but not C:\Program Files\Games.  This is where you'll install Sims 3 this time.
• If you use a third-party antivirus, disable it before reinstalling, and don't reenable it until after you've tested Sims 3 once.  As long as you're not doing anything else at the same time, your computer should be safe.

The idea here is to be as thorough as possible.  Even if these above steps aren't all necessary, doing them together means you've addressed everything on your end.

If you happen to have access to another computer running Windows where you could test-install Sims 3, I'd suggest that too, in addition to or instead of the above.  If your packs show up properly on that computer, the problem is something on your current system.  If not, it's likely an account issue.  The other computer doesn't need to be powerful enough to run Sims 3—just open the launcher to see whether your packs are present, and you'll have your answer.