Applied for parents GC within 90 days

[phanivas]

I applied for my parents GC (I-130 & I-485 concurrent) in Jan 2022 one month after they landed in US on their B2 visa. Only after I applied I came to know about the 90 day USCIS rule. Meanwhile, they got their biometrics done in Feb 2022 and currently their case is still pending. How detrimental is the 90 day rule going to be on their overall case? Are there any steps I can take now to avoid their application getting rejected? Most online articles state that you will have to show evidence that you did not have any intent to actually apply for GC when you came to the US. How can we prove this. In our case, it was more of a last min decision to go ahead and apply considering the stress of leaving parents in India with everything going on related to COVID.

Any guidance is appreciated.