What is a payment protector?
To what, exactly, are you referring?
Typically, this refers to some form of loan insurance.
Are you talking about the payment protection aspect of the advance CTC ... see the info here:
https://www.irs.gov/credits-deductions/2021-child-tax-credit-and-advance-child-tax-credit-payments-topic-h-reconciling-your-advance-child-tax-credit-payments-on-your-2021-tax-return