I can’t speak for Stanford since this is the first year of requiring all scores
But MIT will ask (see footnote) what the score was before cancellation. They will also ask about non-reported scores. The only way they won’t ask is if you self studied, since obviously the course isn’t on the transcript. Otherwise they’ll assume you took the AP exam if you took the class.
They will accept valid reasons for not taking the exam, but there is no way to hide a cancelled exam
Footnote. The above applies to applications being seriously considered. So a piece of portal astrology — if you don’t get a request to explain a missing score, you’re not getting in.
And now, since the OP cooked themselves by creating sockpuppets to comment on this thread, I’m . moving on.