Amended Return to change marital status

When I went to file my taxes I filed as MFS (stupidly I completely forgot it was relate to last year). Last year we were single, I got married 01/2022. So I amended one week after I filed. The thing is, my husband's return was rejected because  his SS was already on my return. I went to the IRS website and it says that its taking almost 5 months to get the amend processed. My husband already file an extension. 

What happens if the IRS dont amend till october? He still wont be able to file? Will he be penalized? 

Im freaking out! :(

 

Thanks a lot!!