I don't know about defeating the PLAAF in combat, but for sure they are better than the PLAAF in flying over football games
One RQ-180 was photographed flying over the Philippines in September 2021. In a Pacific War 2.0, it is absolutely certain that the RQ-180s will have significant presence in the theater, mainly for ISR (and possibly EW) against the PLA.A flying wing will have all aspect stealth so it will be very difficult to detect. No surprise there. The B-21 will be the most important asset in a potential Pacific War.