No. You never have to return the stimulus? Where did you see that?
If you got the 3rd Stimulus payments based on your 2019 or 2020 return but are not eligible based on 2021 income you do not have to pay it back. See Question #3 here
https://www.irs.gov/newsroom/2021-recovery-rebate-credit-topic-c-eligibility-for-claiming-a-recovery...
