The second economic stimulus payment (sent in late December 2020 or early January 2021) was most likely based on your 2019 return. If you did not qualify at that time due to your adjusted gross income on your 2019 tax return, then you could have gotten the Recovery Rebate Credit on your 2020 return. However, if your AGI is still too high, then unfortunately, you do not qualify for the credit.
However, if you are disqualified from the third stimulus due to your income, then you can recapture that using the Recovery Rebate Credit on your 2021 tax return, assuming your adjusted gross income decreases.
@kashbunker