Queer folk are your community members where queer people are a demographic of the population.
In my case queer folk and trans folk and LGBT+ folk come from a tip from Santa training, where you talk about a kid's folks instead of parents, so as to not raise issues when kids don't have them but guardians instead.
Queer folk are the people among my crew and homies and mates who identify as queer or queer-adjacient.