Oppty Zones recycling Capital Gains separate from Losses?

[Jack Cod]

Everyone knows that Capital Gains can be put into Opportunity Zone Funds to defer taxation for 7 years.

But what about if you have a mix of gains and losses -- can you elect to treat the gains as gains and invest in OZ Fund to enjoy the deferal AND treat the losses for separately and carry forward to offset additional later gains?

I sold stocks in January 2020 for gains that I'd put into OZ, and yet could harvest some losses now in March to enjoy the benefits against next year's gains!