Yes, certainly.
I first will just correct a point of fact: Decriminalization in British Columbia did not extend to people under the age of 18.
In Quebec, one thing that has differed in Quebec specifically compared with other provinces is that traditionally there has been a preference for stimulants—particularly a long-standing preference for cocaine—versus opioids in Quebec. That has, somewhat perversely perhaps, been protective against opioid overdose deaths.
However, the drug supply now is so contaminated and so unpredictable that this protection is no longer present. Basically all drugs now have a much higher risk of overdose because of contamination with fentanyl and other substances.