If you indicated on the 2020 tax return that you did not receive the first stimulus payment of $1,200 it was included in the 2020 federal tax refund.
If the IRS has records indicating they sent you the first stimulus payments this is why you are now seeing $10 for your tax refund. The IRS would be sending a notice in the mail explaining why the refund has changed.
After receiving the IRS notice and it is because of the Recovery Rebate Credit being removed you can request a trace of the payments if they were never received.
Go to this IRS website for how submit a payment trace - https://www.irs.gov/coronavirus/second-eip-faqs#paymentlost