Nothing about your 2020 traditional IRA contribution can be changed in 2022 or 2023. It's too late to provide any explanation of your 2020 recharacterization unless the IRS specifically requests an explanation.
Perhaps you want to make a traditional IRA contribution (maybe nondeductible) for 2022. You have until April 17, 2023 to make that contribution for 2022, provided you have compensation from which to make the contribution. This would have nothing to do with your 2020 IRA contribution except that your 2022 Form 8606 would include on line 2 the amount from line 14 of your 2020 Form 8606 (assuming that you did no transactions in 2021 that would have required you to file a 2021 Form 8606).
Perhaps you are asking about doing a Roth conversion from your traditional IRA. Any Roth conversion performed in 2023 would be reported on 2023 Form 8606 with your 2023 tax return, not anywhere on your 2022 tax return.
