All Installed DLC not showing up in game since clean uninstall

@Sherlockian2991  Try clearing the EA App's cache, again:

https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/

and repairing the game, again if you have already.  The point is to do the two together, in sequence.

If that doesn't help, please do a clean uninstall of the EA App with Revo Uninstaller (the free version is fine).  Use the Intensive scanning method.  Restart your computer before reinstalling the App, and repair Sims 4 again afterwards.

If that doesn't help either, please run searches for two or three of your missing packs.  Open a File Explorer window, click This PC in the left panel, and enter the folder name for one of the missing packs in the search field in the upper-right corner.  This is the full list of packs:

https://sims4.crinrict.com/eng/extras-2/available-packs-dlc/

For example, if you're looking for Seasons, you'd search for EP05 .  Wait for the search to finish, then make sure the full file path is showing under each result.  If it's not, expand the window sideways as necessary.  Take a screenshot using Windows key-shift-S and attach it to a reply here.  Then repeat for one or two more packs.