It may be too early to tell, but for now, it does not appear that changes in cannabis legalization have resulted in any change in adolescent cannabis use.

Ladegard, K., & Bhatia, D. (2023). Impact of cannabis legalization on adolescent cannabis use. Child and Adolescent Psychiatric Clinics, 32(1), 1-12.

https://www.childpsych.theclinics.com/article/S1056-4993(22)00062-1/fulltext?dgcid=raven_jbs_aip_email