Earlier delivery before 2030 is pretty feasible, judging by the flight test progress made. It just take 5-6 years for J-20 to get from maiden flight to earlier batch delivery to Airforce, and now CAC has far more talents, much better funded and much more experienced, and a very clear goal:
If US intel carrys any water, China definitely plan to take back taiwan before 2030, then it is highly likely J-36/50 will be requested to be delievered as some small and elite units in PLA before that time.
J-36 itself is AWACS/EW/Air Superiority/Air Strike/UAV commander put all in one, even a few units of them will give PLA a decisive advantage against anyone in Pacific, it surely can make a difference.