Let me just say that the last line of defence is the withholding of funds. There would be interaction with that jurisdiction and a lot of conversation long before the point of withholding funds.
Without getting into a lot of detail on the Canada Health Act, normally funds are withheld and deductions made from Canada health transfers in cases where user fees occur or extra billing occurs, where there is a so-called violation of one of the principles. If over time there was a failure to provide access to physician-assisted dying in an environment where it was permitted by law and provided in most other jurisdictions, one could arguably say that would be a violation of one of the Canada Health Act principles, theoretically, but it is a very long process to turn a violation or an alleged violation of a principle into a situation in which financial penalties are levied.
There is also stipulated, by convention, a process for interaction and mediation with a province or territory when there's a dispute about respect for the Canada Health Act principles.