Since you seems to be new, I'll go ahead and say it (this horse has been beaten to death
)
Daidalos Team and 1C are contractually obliged to not include any hardware that was designed by Northrup-Grumman or any company it bought over the years.
This means no P-61, no Avengers, no further US battleships, and no further Wildcat and Hellcat variants, etc, etc, etc.
It's unfortunate, but there's nothing that can be done about it at this point except to try mods. It looks like World of Planes which will come out fairly soon will have an Avenger at least, but that game, produced by the guys who made Wings of Prey, is likely to have simpler physics, flight-model and damage-model than Il-2. (Pick your poison
)