A 1099NEC you are expecting to receive? That's not your problem. You need to report all your income from your own records.
Actually you can just enter it as Other self employment income or as Cash or General income. You should be keeping your own records. You don't need to get a 1099NEC or 1099Misc or 1099K. Even if you did you can enter all your income as Cash. Only the total goes to schedule C.
How to enter income from Self Employment
https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/...
