The reason why the federal carbon pricing scheme doesn't apply in certain provinces, such as Quebec and British Columbia, is that the federal government views their schemes as equivalent to its own. So you may logically conclude that the impact on the gas price will be roughly the same. It may not be exactly the same, but it will be roughly the same so that the federal scheme is comparable to that of those provinces.
On June 14th, 2023. See this statement in context.