Can I file extension of stay second time in a row for my parents due to the pandemic?

Yes they may apply for a second extension due to the pandemic.

I am fighting my i751 case in New York as well as I am staying in New York now I got a job at little ferry nj ,can I work in nj

Yes, as a permanent resident, you are permitted to do so.

Yes you may withdraw one I765 application.

It may take 2-4 months from time of submission until biometrics appointment is scheduled.

Am I still eligible for daca?

Unfortunately not based on residence requirements.

No if applying with underlying I485, there is no I765 fee.

How to change DOB in i 130?

You may contact USCIS directly to inform them of the error.

Yes this may be an issue but can be overcome with satisfactory evidence of good faith relationship.

Removal order ?

Yes there is a risk of being detained with an outstanding removal order.

For how long can I actually stay outside of the USA with my re-entry permit?

You may remain outside of the US during the permit validity period.