Do some searching on the organizations DULF (Drug Users Liberation Front) and VANDU both on the downtown East side in Vancouver BC. They've been involved in things like mass resisting camp sweeps and fighting legal battles to get addicts access to safe injection sites and safer supply, and many other things. VANDU was a key player in organizing the unhoused community to protest and resist displacement of the whole neighborhood ahead of the winter Olympics. It was a huge thing.

There's a podcast called Crackdown you may find interesting as well. Garth who hosts has been in VANDU a long time and does incredibly good work.