Not any more. There's sericeous restriction on outflow of data now.
Most chinese data-breaches are cut down now.
By the time world catch on to 6th Gen fighter production models, US would have already been flying 7th for over a decade.
Does Skunkworks team still operates? They always have something in making.
While the world decides that they will start the work on next generation fighter, they already a prototype available for testing! :hail: