RFE Response time extended?

Yes, there is an additional 60 day extension due to COVID.

You should consider private consultation with a personal injury attorney.

if you don't go to court, a warrant for your arrest will be issued.

Is it legal to own an online store company registered in another country on J1 visa?

You can own the company online but you cannot work in the company in the US if your J visa doesn't cover it.

Can I switch my profession from STEM Related to Arts Related on work Visa?

No, not if you change to an arts course.

If it's still showing after 7 days of payment, call the court and inquire.

You can Look it up by calling the jurisdiction that the cop is part of. They should be able to find out if you have a ticket or warning.

How long can I stay in India?

If you stay longer than 6 months, be ready to show the valid reason for doing so, as well as evidence that you didn't abandon your US residency.

You will need an ID for the interview. You can also tell the officer about the lost passport.

It is advisable to consult privately with an experienced immigration attorney.