You can try sending the extension, but there no guarantee that will prevent an RFE. Nothing will be sent back right away unless you omit required documents. Also be aware that any delay in the I-485 for required initial evidence (RFIE) will place a hold on the EAD.
Wife did biometrics for I-751 in April 2019. I don't recall ever seeing "Fingerprints Taken". However, wife received a notice that I-751 biometrics were reused the same day she filed the N-400. I-751 status never changed from "Case is Ready....." until after the N-400 combo.
We had a combo interview, but we never got a "Case was Transferred" status. Status was "Case is Ready to be scheduled for an interview" from May 2019 until after our combo interview in Dec 2022.
There is no reason to file the I-751 if she entered the US via a CR-1/IR-1 visa 2 years after marriage. There is no choice here. File the I-90 to correct the card. If she wants evidence of her status, get an infopass appointment for an ADIT stamp.
It's a default statement NVC is pushing to many people. If you are confident of your current annual income, I wouldn't worry about it. The CO will make the final decision.
I can't answer that. I do know that there are a LOT of expedite requests. Everyone thinks their case deserves to be pushed to the front of the line ahead of everyone already waiting. A LOT of people request expedites. It does no harm in trying.
You are misinformed. You can request an expedite if your case qualifies. There is no charge for expediting family based petitions. Premium Processing is not available.
How to Make an Expedite Request | USCIS
Looks like, roughly, about another 9-11 months or so just for the USCIS part of the process. Then comes the NVC part, and later, the Consulate part (interview). At which USCIS Service Center is the I-130 being processed?
A properly filed I-485 grants the applicant authorized stay inside the US until the adjustment of status is either approved or denied. However, be aware of the restrictions associated with adjustment of status.