According to iRacing:
We are very excited to announced we have reached an agreeement with Ferrari to add the 488 GTE car to iRacing. This will be the first of several models from the iconic sports car manufacturer to join the iRacing stable.
So it seems this is the first of multiple Ferraris, which is great news. Hopefully this doesn't fall the way of the other Astons and BMWs we were supposed to get.
In any case, creating a duplicate 488 but GT3 version would be pretty simple for iRacing. It would be even easier if we had greater controls over BoP.