Spare parts for Canada's F-35 fleet will be controlled by the U.S.

What annexation deal?

No, it's the standard procedure for F35 parts supplied to allied countries. Which is why it's a bit of an issue in the current political context.

But a U.S. Government Accountability Office report in 2023 revealed the rules governing the F-35 parts. The report noted that the parts are the property of the U.S. government until they are installed on another nation’s aircraft.