Well, to model something as accurate as possible you need to have real data, info, FM charts, systems and most likely access to real aircraft, (and for military aircraft you'd probably need their/military approval to create such software for the public in the first place)
So if you don't have those you can't model it... not accurately anyway, if you create a module of such aircraft anyway it'll be based on guesses and ED are not about such modules for DCS aircraft.