Deduction on Schedule A for repaid marketplace insurance?

I had a large capital gain in 2022, this caused me to repay my Marketplace premium discount of $6800 when I filed my taxes in April 2023. I am now filing Schedule A for the first time because of large medical bills that were paid off in 2023 that were from 2021. I would like to know if the $6800 I paid in 2023 for 2022 medical insurance can be deducted on Schedule A?