Why has our tax return not been processed yet? Mailed on 02/20/2022.

We mailed our joint tax return on 02/20/22. E-filing was not an option because of an issue with my wife's SSN. We claimed several tax credits this year. Tracking shows it was delivered around 2/28/2022 at their facility in Austin, Texas. There has been no update since then, and the IRS refund status tool cannot "find" our tax return. It is now almost July. Should we be concerned?