The list has yet to be published, presumably because the legislation has yet to be finalised, but according to this article (posted yesterday, 10/08/21):
Quebec will launch its COVID-19 vaccine passport system as of Sept. 1, Health Minister Christian Dubé announced Tuesday.
With infections on the rise and an “inevitable fourth wave on the way,” Dubé laid out the details of the province’s plan, which will start with gyms, bars, restaurants, festivals and events venues across Quebec.
The vaccine passport will only be used to access non-essential services, but it will not be required for retail stores. As for religious gatherings and weddings, Dubé said the government is still discussing whether or not to include them as events that will require the passport.