Years ago, when EA App wasn't even a thing and when it was good old times, I launched Origin and saw that EA removed The Sims Medieval from my library. When I asked them about it, they told me that it was due to being purchased from a third-party seller, and bla bla bla. Now I see it is back on EA App, although I get an error when downloading it. What about you?
The same question goes for other The Sims games of yours with the same fate.