aren't those movie props?
this particular movie definitely used a lot of real hardware. the question is what hardware are props, and which are real. in the trailer it's pretty easy to see which ones are props or stylized, for example the HMD, the particular flight overalls and dress uniform, certain specific firearms, and certain specific in flight scenes of the planes are either props, stylized, or CGI
but other shots of the aircraft from the ground, and certain ground vehicles are definitely real. whether that shot includes a real J-20 is open for debate, but at this stage I would say is not implausible