Yep, because banking is allowed, you can start looking for points almost 2 years ahead of time, so I would start looking now.
The thing you need to be careful about is depending on what months you plan on going for your trip in 2021, make sure the points are valid for that timeframe. So for example, if you are looking to take trip, say, in Oct. 2021, than you can accept April. 2020 UY points, which will expire on March 31st, 2021. But if you bank it forward for one more year, it will be good from April 1st, 2021 to March 31st, 2022, which will cover travel from April to Dec. 2021. But you need to get April points soon, as the 4 month banking is fast approaching for April UY points.
So I would look for April 2020 UY points and after to whatever month UY points you planning traveling in 2021. Remember, you can't get points for UY after your planned travel month, as transferred points cannot be borrowed to make a reservation.
Hope that makes sense.
Great3