I have additional federal tax withholdings from my paycheck every two weeks in 2022. I don't see that additional payment I made on my W2. Do I manually add that amount?

Ask your employer.  It should be include with the regular withholding in box 2.  All your federal withholding is a single amount in box 2.  It isn't broken out.  

Box 2 of the W-2 should include all federal income tax payment made in 2022.  If you have reason to believe the amount in box 2 is incorrect then you need to contact your employer.  It would be their responsibility to provide a corrected W-2 if the additional tax payments were not included in the original W-2.