It does not include it because "line 14a is "Total distributions you received in 2021 from all HSAs"." You didn't get this distribution (for the excess) in 2021, you got it in 2022.
So "Also include any excess contributions (and the earnings on those excess contributions) included on line 14a that were withdrawn by the due date of your return."" But since the excess contributions that you were referring to were not in line 14a, then they won't be in 14b.
The distribution of excess contributions that they are referring to are from your 2020 return, which would have been distributed in 2021.
See the instructions for lines 14a and 14b on page 6 in the 8889 Instructions.
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