F-22 entered service 2005
Air to air kills since entered service:
2005-2022: 0
2023: 2
Air to air kills since entered service:
2005-2022: 0
2023: 2
Having 0 air to air kills for an interceptor is a good thing in the way that it's doing its job as a deterrent and enemies don't even try.
Reminds me of George Carlin's joke: shellshock becomes battle fatigue becomes PTSD. Don't make it better, change the name!
In this case, though, I imagine the difficulty (and associated prestige) is considerable less... :)