Re: How do I get my Sims 3 games I have registered on the Sims site to Origin?
@BrownLightning96 All of the packs that you registered on the Sims 3 site should appear in your Origin library. (The exception is standalone worlds, which Origin doesn't acknowledge and which still need to be downloaded from the Sims 3 Store.) If you're missing expansion or stuff packs, is it possible you had two different accounts on the Sims 3 site? You'd need to contact EA customer support to sort that out.
https://help.ea.com/en/contact-us/
There are a few ways to force packs to download from Origin. First though, clear Origin's cache, restart your computer, and try clicking the download button again.
https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/
If that doesn't help, turn on automatic game updates in Origin. Hover over your username and select Application Settings; under Application (the first header), scroll down to Client update and allow Origin to automatically keep your games up to date. Then quit, restart your computer, and sign into Origin again. The downloads should start automatically, perhaps after a few seconds.
If this doesn't help, please list which packs are missing and which ones won't download.