Congratulations on getting married.
In order to qualify for the $7,200 contribution limit, you would have needed to have family coverage on your HDHP as of 12/1/2021. Then you would fall under the Last month rule and would have been able to contribute the additional $3,600 as long as you maintained that family coverage throughout all of 2022. See the instructions for Form 8889, especially Line 3, especially point 2:
https://www.irs.gov/pub/irs-pdf/i8889.pdfIn order to have family coverage on your HDHP, I believe you would have needed to add your new wife to your HDHP effective 12/1/2021, which it sounds like didn't happen. But you can confirm this with your health insurance company to be sure.
You can start contributing the 2022 family maximum to your HSA starting 1/1/2022 (provided of course, that you either (a) add your new wife to coverage effective 1/1/2022, or add her to coverage before 12/1/2022 and keep family HDHP coverage throughout 2023).