@Tremayne4260
I would like to provide several details in case they are helpful. This is from my experience as well as from what I've gathered talking to some players.
I can see The Sims 2 in EA App. It shows up as just The Sims 2 and the game tile says The Sims 2 Double Deluxe. The download button does not work, it starts loading the download confirmation window (where you select the installation location and the language), and then throws an error that says: There's a problem with your download. Something went wrong with your download. Give us a few minutes, then try again. This same error has been showing up ever since TS2 showed up in EA App.
The Sims 2 Spinoffs (The Sims Life Stories, The Sims Pet Stories and The Sims Castaway Stories) have also shown up, even before TS2, but they downloaded without issues. As they use legacy installers, I was offered a download link (which expired after a few hours) to use in the browser instead of directly downloading in EA App. After they finished downloading, I had ZIP files with installers in them.
At least one player was able to download something when clicking on the Sims 2 in EA App, but it was The Sims 2 Store Edition; they also got a download link (that expired after a few hours). So even though their download button worked, it did not download the game that should have been there.
I have a theory that I am unable to download anything because I don't own Store Edition while EA App is trying to download just that. Whoever works on this, they should check that The Sims 2 game tile (in the players' libraries) is connected to the actual The Sims 2 Ultimate Collection, as it should just be able to download normally, just like Sims 3 or 4.
If I find anything else, I'll update this post, but so far this is what I have been able to gather.