Hard to believe as it only comes from 2019, I dont see how they wouldnt have the HQ-22 conducted itself against the J-20. Also the S-300PMU-2 acutally is worse at detecting stealth targets than Iranian domestic systems. F-35I aircraft where tracked and shot at 4 times over the entire iran isreal war, yet everytime the missile was launched it was most probably spoofed by the F-35's EW systems or shot at a decoy.
What's hindering HQ-22 from having better chances? Is it the tradeoff on radar & guidance design?
HQ-22 uses the P-band AESA search radar LCQ-776 against stealth target, which is great, but its missile and target acquisition radar are cheaper than those of the HQ-9A.
Problem isn't just stealth target, problem is stealth under contemporary(i.e. ahead of existing SAM ecosystem level) jamming.