Not according to the CDC with kids

https://www.mpp.org/issues/legalization/adult-use-legalizati...

My guy, this is making the opposite argument from what you think:

"On the illegal market, no one is checking IDs before selling marijuana. When and where cannabis is illegal, high schoolers often sell cannabis to their peers. In contrast, licensed cannabis stores have overwhelming compliance with age-gating."

It has indeed not increased the cannabis use of kids, but that would also still be illegal. That study is an argument that age gating works.