Issues with Managing Add-Ons in Sims 4

@Katylou43768  Please reinstall Origin and let me know whether you can download your content from there.

https://answers.ea.com/t5/Origin-Client-Web-Technical/Downloading-and-installing-Origin-Windows-and-Mac/m-p/11915666

And please also confirm that you've signed into the correct EA/Origin account.  Normally missing content indicates that someone has accidentally created a new account, which is easy to do, and the content you've downloaded is bundled with the Digital Deluxe edition of the base game.  So what it sounds like is you've signed into an EA account that only owns the DD base game and is (possibly) linked to a Steam account that owns other content.

One way to confirm you're in the correct account is to search your email inbox for receipts or other correspondence from EA or Origin.

@puzzlezaddict Just saw this after commenting on another thread that you posted on! I will try this and get back to you! I tried to look back to see if I had a steam account with one of my emails and I definitely don’t. So I may have used my husbands steam account for the dlc. I’m assuming I’m in the right EA account since it shows all my dlc. But I’ll double check. 

EDIT: Okay I downloaded Origin (Didn't know you could actually, I thought it was no longer a thing), signed into my account and it began verifying my Sims 4 game. Cool. I was able to open it up. It's still the same game that I started. I was able to log into my husband's steam account and it looks like that is where I bought the DLC packs. Is there a way to play the game with the DLCs being on steam?

On another thread someone mentioned checking to see what steam account was linked to my EA account, it's my husband's that is linked. Hopefully that information helps.

@puzzlezaddict  This worked! Thank you for all your help! Once I realized that I bought all the DLC in Steam, that made way more sense. So exciting! LOL