No, the banked 2021 points into 2022 UY could not be used passed Jan 31, 2023.
If you bank Feb UY 2021 points into 2022 they would need to be used between Feb 1 2022 - Jan 31 2023. These points would not be able to to banked or extended again passed this end date.
Your Feb 2022 points (non-banked) would have to be used for a trip Feb 1 2022 - Jan 31 2023 unless you bank them into 2023 UY.
Hope that helps