The missile fused and was a normal AIM-9X.
You can see result of the war cranium detonation in the videos as a cloud of black smoke. It's just that things are happening so fast that it looks like the missile just sails right on through.
> This being the F-22's first air-to-air kill after nearly 2 decades in service, it's not like these missiles are a precious resource to be conserved.
The first clause of your sentence here is not logically related to the second clause. These acquisitions programs are separate. While missile purchase quantities are adjusted based on projected needs, it is not as if there is a quantity in inventory earmarked specifically for the F-22 only.
> It is possible that the F-22 simply could not get up high enough to engage with guns even if that was desirable
It wasn't desirable, based on the experience the Royal Canadian Air Force had trying to shoot down a wayward weather balloon in 1988. https://apnews.com/article/268893fddde785d029d5a51b136951eb
Over 1000 rounds fired without bringing the balloon down.