AB&BB

THANK YOU SO MUCH for your response!! I REALLY appreciate your help!! It really helps a lot in a time like this with so much worry and anxiety about the process. Thank you again!

There's only one way to find out for sure - to go and try. I'd bring receipt for I-751.
 
No consequences, it's safe. If you don't get it, you can always try again and/or file I-90 and try with it.

UPDATE: 3/29/2024

I called USCIS for InfoPass appointment and I explained our situation. The agent told me that we could set up an appointment to receive an I-551 stamp at one of their office locations. We received a verification number and the phone number they will call us from and we should receive a call within 30 days. I asked if we need to file the I-90 before or after this appointment and she said that we do not need to file the I-90 since our I-751 is in processing. I asked if filing the police report for the lost card would cancel that processing or cause any problems with it and she said that it would not. Is her information accurate? 

That’s the correct form

It is an internal government date / marker.. OMB Office of Management and Budget. If it is the form that is available on the USCIS forms tab, then it is the current form, even if it is past the OMB expiry date 

USCIS must not receive the package before 7/22/2022, which 90 days prior to the expiration of her green card.  I would not mail the I-751 package until that date.
 

 
 
 

As others have posted, don't try to hit the exact date to file early, always ends up poorly it seems like. wait a week after your eligibility date to file. they are taking 2-3 years if not longer to even look at I-751's, an extra week isn't going to matter, you will be filing the N400 for citizenship before they see your I-751 more than likely.

You can safely mail it 90 days before the card expires if it is going to Phoenix and 89 days before the card expires if it is going to Elgin (suburban Chicago).  Time travel isn’t a thing with USPS except when mailing from the western pacific rim.  Lots of non stop flights from the pacific rim to O’Hare.  Sky Harbor: not so much.  
 
Among the October 2021 I-751 filers none of us who mailed on day 90 or 89 had any problems.  

Some kind of hocus pocus witchcraft organization that the government follows🤣
We filed ours in February of this year. We checked until the night before whether the edition date changed. You might want to do that 

Whatever form is available on USCIS website the day you send your petition, is always the right form. 
 
You can also check on the i-751 page on uscis.gov under the tab "Edition Date". It clearly says:
 
Edition Date   12/02/19. We will publish a new version of this form soon. In the meantime, you may continue using the 12/02/19 edition despite the expiration date. You can find the edition date at the bottom of the page on the form and instructions.
Dates are listed in mm/dd/yy format.

As what was pointed out to you, check the USCIS website right before you send off your packet to make sure the form did not update on you. These forms can change on a dime!!!!

You're ok, this is directly from the USCIS webpage