You may be just looking in the wrong place. Where on the federal return the 1099-NEC income went determines where TT will put it on the PA return.
On the federal return, it should have been reported on schedule C, then line 3 of Schedule 1, then line 8 of form 1040. That will have TT out it on line 4 pf PA form PA-40.
If it went on line 8 of Schedule 1, on the federal return, you are correct, it should be entered as misc comp on the state return. From the instructions for form PA-40:
Generally, other or miscellaneous income is either compensation
on Line 1a, (see Page 10), or business income on Line 4, (see
Page 17). If you cannot determine the income class, contact the
department for assistance.
https://www.revenue.pa.gov/FormsandPublications/FormsforIndividuals/PIT/Documents/2020/2020_pa-40in....
