Can anyone predict how advanced anti-stealth satellite technology will become in the future? Judging by the low-orbit satellite deployment plans of China and the United States, within 5 to 10 years, satellites overhead will be as numerous as grains of sand scattered on the ground. Currently, Jilin-1 satellites can already capture images of B-2 bombers in flight. But will tens of thousands of future anti-stealth satellites—generations more advanced than today's models—truly make the skies transparent? Could they render aircraft and warship stealth technology obsolete, relegating it to a capability only effective against weaker nations?
What if those satellites are jammed, spoofed, hacked or brought down with weaponised space debris clouds? Do you put all your air superiority eggs into that sensor basket?
No doubt this is one component of counter stealth and just overall sensing that is used by China but stealth is always a great advantage.
If an effective counter stealth technology was developed, it would still require time to integrate with the rest of the military and time to proliferate.
Also keep in mind that western pacific conflicts between US and China requires the US to travel over to China with some of its military gear in a posture against a densified Chinese military presence. So Chinese stealth of equal effectiveness compared to US stealth is going to be more well supported vs US stealth platforms that will be facing off against a greater density of Chinese sensors and platforms, stealth or otherwise.
A J-20 flying around California against a backdrop of hundreds of US fighters, sensors on ground sea and air is not going to fare as well as that J-20 flying against USAF/USN F-35 near China with a backdrop of hundreds of Chinese fighters and sensors with the USAF/USN asset being relatively less well supported.
If stealth in the air is about to be significantly less effective, China wouldn't be emphasising stealth so much with 6th gen fighters and all the latest aircraft it is fielding/ about to field; WZ-x, GJ-x, H-20, UADFs, CCAs, J-50, J-36... all focused on not just frontal aspect stealth like 5th gen fighters.