BernieAM

First, they prefer that your case is interviewed within that four-month "window" indicated on the NOA2. If it is required, the NOA2 can be extended up to a year by your Embassy but with good reason (a pandemic qualifies) and the Embassy doesn't need to extend the NOA2 for the "one" year from expiration. The new extension, if approved, will be for an additional 4 months. Extensions are in the form of 4-month extension with each approval till you reach one year. If you need to go beyond a year, then you must go to the end of the line and begin the process from I-129f over again and pay the fees. In normal times, you would provide a reason for the NOA2 extension when requesting it from your Embassy.

All of the above information is good but I'd like to add a comment on your SSN.
 
We waited about a month to get married and then about 2 weeks to apply for her SSN. I thought why not just get the SSN in her new married name (we had a copy of the marriage certificate by this time). The SS person couldnt find her under her married name in the system as the application has to be under the original visa name and name on the I94. Then it turned out (for us anyway) we had to mail in her documents for a manual review. Not a big deal as it added only 4-5 days to the process. So a week long wait that most experience turned out to be closer to two weeks.
 
But here's where the learning opportunity comes in - to reapply for your SSN under your new married name your I94 cant expire. Hers expired in the beginning of March and I think we tried to reapply in mid-March - after her I94 expired. 
 
Now we're waiting for her AOS.
 
You dont 'need' the SSN card to be under your married name for most services (that I can think of) as long as you have your marriage certificate. 
 
That's our experience and I hope someone finds it helpful.

Everybody is giving great Information here. Definitely get your SS card as soon as you enter. My fiancee and I arrived on a Monday night at LAX (8pm). Drove home to Las Vegas, next morning 9am went to the SS office, so about 14-16 hours after POE, and her entry was in the SAVE system. Had to kinda push the employee to check the system as he didn't think it would be there, but it was, less than 24 hours after POE. Doing this will save you tons of hassle during your first 90 days here. Hopefully the SS offices are open finally when you get here, but they should be by then I would think.