While in the US visa is not relevant status. Visas get you to the entry. Once entered statis is what matrers and can fnerally be extended or changed.

Yes - you file an I-130 petition packet for him along with him filing an I-485 packet.

Try a letter from your accountant confirming you are self employed and your 2020 income as well as your projected income for 2021

These cases take a year to a year and a half. That is why you got a receipt extending your green cars for 18 months.

Even casea that are currwnt in F2b are waiting several months.

Anywhere from days to months - you can make monthly inquiries.

Info left out. What is the basis for work card How are you abroad on advance parole? Why cant you work abroad or remotely?

Go to interview and explain that I-360 is pending.

3 months does seem like a long time even taking into account covid delays You said the fees were 1225 which is consistent with I-485 and...

You need to wait til you receive the RFE to see what they want. If you didnt file medical with I-485 that is definitely one thing they want....