I disagree in this particular case. I have seen plenty of parents denied B2 visas. Elderly parents of US citizens are prime candidates to skip the long immigrant process and overstay tourist visas, then stay. That is just reality. The OP's parents are not in the Philippines, so your experience doesn't apply in this particular case.
If she can apply under the 5 year rule, I would not file based on the 3 year rule. This is what we uploaded for my wife's N-400 based on the 5 year rule:
5 years Tax transcripts
Proof of my 1st marriage Termination
Proof of Wife's 1st Marriage Termination
Wife's Green Card
Our Marriage Certificate
Under the 3 year rule, it would have a been a LOT more.
Why did your husband enter "Adjustment of Status" on the I-130 if he submitted the I-130 from Canada? The I-130 is just the first part......everything is is slow, sadly.
and there could be an additional issue. If the petitioner entered Adjustment of Status on the I-130, the he will have to submit an I-829 to move the approved I-130 to NVC (if OP opts for consular processing).
OK. Then you submit the I-485, I-131, and I-765. You have to stay inside the US until you receive advance parole. ....else, you will abandon the I-485.
Are you aware that, once you submit the I-485, you cannot work inside the US or leave the US for up to 6 months or more?
Yes, you will receive a receipt notice for the I-485.
Note: The I-485 is for applicants who live inside the US.