It’s on the lock screen, but I think only when the alarm is coming up

Edit: I can only get it to show up there when the alarm has gone off and I’ve snoozed it

It appears close to the finish time, but you can also tap the alarm icon itself and it’ll take you right to a cancel button

I just tried it and it only for snoozing alarms. I definitley cancel those mfs all the time.

E: it’s timers, I use timers as a snooze one I cancel those from the Lock Screen while still asleep all the time.

If you use the sleeping settings, and wake up before your wake up alarm, it will prompt you “it seems you’re awake, do you want to cancel your upcoming alarm?”

Either on the Lock Screen or just open your Clock app where you had set the alarm, and toggle it off.