Yes,, they show up as a temporary contract so as long as the trip works for both UYs of the points, all is good.
For example, I could use both Sept and transferred Dec UY 2022 points to book a Feb 2023 trip as that trip falls in the 2022 UY of each of those.
However, you can not book a Nov 2022 UY trip with transferred Dec 2022 UY points because it would require borrowing and you can borrow transferred points, even though it works for the Sept 2022 UY points.