@SLSB said "My thought is to manually deduct any reimbursements from the amount put on the 1099-NEC."
Don't do that. The amount your report as "Gross receipts or sales" (line 1 of Schedule C) must match or exceed the amount shown on your 1099-NEC(s) or the IRS computers will be triggered.
As @Carl said, you report all1099-NEC amount as income, then you deduct the material reimbursement part as expenses.
