It would be fairer to say that the Canadian system is national with provincial implementation within that framework.
None of that is the case in the US yet. There have been attempts (by the Rs) to provide block grants to States which have received pushback by the Ds.
Also even today, the Canadian Federal government does not supply the majority of the funds for each Province’s insurance system, it’s still a minority relative to the Provinces. It’s an extraordinarily stable system because the power over whether the system continues to function is largely decentralized.
But yes, each province developed their own program and the federal government agreed to throw in funds as long as certain requirements were met.
Not that different from federal highways funds in the US actually. That’s how the federal government maintains minimums for drinking age, DUIs, speed limits, etc.
That shouldn't come as a surprise considering that just under 80% of all government spending in Canada is driven by the Provinces, and healthcare spending is the single biggest line item for most countries: https://www.oecd-ilibrary.org/docserver/reg_glance-2016-en.p... (Table 3.1: https://i.imgur.com/GDtBaVT.png)