Id be terrified of a war with china. a typical dji pocket drone would be a effective miliary tool in the right hands and they don't even consider that miliary grade. I can only wonder what the "good stuff" looks like.
As for the good stuff like the F-35, the US still dominates. The overall problem is that it's like 100000x the cost. Take this, if the US lost it's entire navy in an instant it would take the US over a decade to rebuild. If the same thing happened to China they can rebuild that Navy in a year.
If Lockheed were to try to make a drone equivalent to the best that DJI has to offer they would make that drone more expensive and actually much worse in performance, size and technology then the Chinese counter part.
One isn't more advanced then the other but each respective country is more advanced then the other in both of these technologies.