Mentally challenged adult applying to tourist visa with his mother, is that possible?

Q: My question is, does he has to apply separately even thought he is legally under my grandmother's care? A: Yes, each person must apply on...

This is a repeat question ... which is not necessary. To leave the US the change of status portion of the papers will have been abandoned ......

Don't be so impatient. Apparently they had sufficient prior biometrics to issue your EAD.

Have no fear ... CIS doesn't use a 'box' ... it is a large series of bins that can handle almost any size package.

How can I REINSTATE my student status?

I think that reinstatement is not a realistic option. I suggest going home, studying remotely and eventually filing for a new F-1 visa stamp.

I too am concerned about this activity. I consider 3-4 times a week to be too frequent. I think that your believing that holding the...

How long can I stay in the US on a pending I-539 petition?

Although you didn't say what the COS was requesting ... a B-2 perhaps? In any case, the chance of it being denied, as Mr. Smith stated, is quite...

Health Insurance proclamation ?

I agree with Mr. Smith's excellent and complete answer.

Can I travel and return to the U.S. using current H-1B visa with old employer and new H-1B approval notice I-797?

Although technically this is legal ... is it really wise for you to travel during these times of the pandemic?

UK travel ban?

I agree with my colleague ... wait a few days to see what the new president decides to do.