If the reservation is in your 2026 UY, and you cancel before the end of your banking window, and at least 31 days before check-in, yes.
If you borrow the 2026 points into your 2025 UY, for instance to make a reservation that occurs in this month, no, if you cancel they’ll be stuck in your 2025 UY.
Everything depends on the UY of the trip, not when you book the trip.