@Xandi001
The most important thing to know ... if you say you did not get the third stimulus BUT the IRS thinks they did send it then you must initiate a trace to refute their findings ... AND you must pay the balance due in the meantime ... you cannot afford to wait for this situation to be concluded which could take months.
Double check your bank statements and Check your IRS account (both accounts if married)
Your Online Account | Internal Revenue Service
If the IRS thinks they sent it to you but you didn't get it request a trace for a missing third Stimulus payment
https://www.irs.gov/newsroom/questions-and-answers-about-the-third-economic-impact-payment-topic-j-p...
