If it was just the trade spat, you might be right.
But there's also Trump repeatedly talking about annexing Canada. That goes well beyond a trade spat, and I would absolutely expect Canada to do more in response because that is in the mix. Including actively working to reduce their dependency on US-sourced or US-transiting products.
Absolutely. Canada is almost certainly going to cancel or severely limit a pending F35 order, and is actively sourcing aircraft and negotiating mutual arms deals with European partners.
Of course, NATO was founded on the assumption that the US is a reliable trading and security partner, and the defense supply chains reflect that assumption. It will take time to untangle those chains, but you're watching all of NATO speed-running that process right now.
I'm sure Rolls Royce expects their order book to grow over the next few decades. Likely some engineers have been tasked with researching the viability of creating drop-in replacement models for American engines.
But there's also Trump repeatedly talking about annexing Canada. That goes well beyond a trade spat, and I would absolutely expect Canada to do more in response because that is in the mix. Including actively working to reduce their dependency on US-sourced or US-transiting products.