There were three stimulus checks issued---two for tax year 2020 and one for tax year 2021. It is now too late to seek the recovery rebate credit for any of them, even if you did not receive them all.
You can check your online account with the IRS to see if you received them.
https://www.irs.gov/payments/your-online-account
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**