My expansion packs, and digital downloads are not showing in my worlds list??

EL670419​  Which worlds are missing?  Do you see any other content from those packs in-game?

Please also let me know whether the packs are listed as installed in the EA App, under Sims 4 > Manage > Manage add-ons.  I'm not sure from your description if that's what you mean.

For the performance issue, please provide a dxdiag.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.