That propane- based trap is burning the propane as fuel to generate CO2 and water vapor, which is what the mosquitos are attracted to.
I know. I was so disappointed to see Gina falling down the Kevin Sorbo rabbit-hole. Sorbo, at least, has multiple strokes, which have altered his personality, but for her, that seemed to be an un-forced error.
Note that Canada is still on fire, the affected area is larger than many US states, and now that the smoke isn't blowing south into the state where I live, we aren't talking about it. So, maybe a little truth to that. We, as resource-constrained individuals, have a hard time focusing at things distant from us for an extended time. It's a pro-local-survival bias, so has an evolutionary value. However, it's also a blind spot that can be ruthlessly exploited by those with something to hide.