I’ve been awakened by the dog taking a massive shit more than once

I don’t know about smoke, but I can tell you from personal experience that it’s possible to be awakened from a deep sleep by a strong smell.

It can for some animals at least, I can drop a treat in front of my cat’s nose and it’ll wake him right up.

https://www.timesnownews.com/lifestyle/food/this-award-winning-alarm-is-a-spicy-solution-to-waking-the-deaf-and-deep-sleepers-article-152290396 wasabi scent is being used as an alarm