The stimulus payments from 2020 are no longer available.
The stimulus payment from 2021 is available until 04/15/2025
If you were a dependent on someone's tax return in 2021 you are not eligible for the EIP3 stimulus payment.
If you were not a dependent then you need to check your IRS account to see if the IRS sent you the $1,400 stimulus in 2021. Go to this IRS website for your IRS account - https://www.irs.gov/payments/online-account-for-individuals
If the IRS did not send you the 2021 stimulus for $1,400 then you need to amend the 2021 tax return you filed to get the Recovery Rebate Credit.
See this TurboTax support FAQ for amending a prior year tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...