How can I apply for an SB-1 visa after being outside of the U.S. for more than a year?

Yes you can apply for SB-1. You should discuss with your attorney, however, as it may not be required.

It is very hard to get an SB-1 visa. If you left in November before Covid-19, then you need to explain why and you should get back into the country immediately. Very few SB-1s are issued if you have stage 4 cancer and can''t travel, maybe. I had this case and it got approved.

It may indeed be necessary to apply for an SB-1. You should hire an immigration lawyer to go over the requirements for the SB-1, as well as to understand what could happen if you had to present yourself for admission at the border after such a long absence.

Yes you can apply - discretionary on the part of the consulate if the reason for not returning is valid, U.S. taxes paid etc.

You can apply to this at the U.S. consulate together with an interview.

As long as your I-829 petition is pending, you remain a conditional lawful permanent resident. You should contact the nearest U.S. embassy or consular office to inquire about their SB-1 application procedures. Some offices have indicated that they are not accepting SB-1 returning resident visa applications until they resume routine visa services.