Yes, that was part of the amended rule passed earlier this year. Once the draft begins, you can trade picks in the following's season's draft.
Rule 7.4a.2 is: 7.4 – In-Draft trading is allowed with the following restrictions: 7.4a - Rookie Draft. 2. Trades may involve rookie draft picks in the current draft being conducted and the next season draft only (during the 2020 Rookie draft, only 2020 Rookie Draft and 2021 Rookie Draft picks can be traded), free agent players and/or veteran players, and/or draft picks in the upcoming Free Agent Draft only (during the 2020 Rookie Draft, only 2020 Free Agent Draft picks can be traded).
Not the 2021 Free Agent Draft picks cannot be traded until the 2020 Free Agent Draft begins.