EB3 takes time. Make sure you maintain your B visa throughout the process. Consult with a lawyer to make sure you dont fall out of status.

Divorce will not impact your green card processing through employment. Have the final divorce decree at hand in case asked by USCIS.

Consult with an attorney for complete documents review.

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It depends on her I-94 validity. Also she has other options besides H4. Consult with a lawyer right away to review her documents and advise on...

You will need to carry your i-797A approval notice when coming back. You cannot use an email.

Usually copies will be sufficient but to be safe reach out to the embassy directly and ask this question.

Yes, the physical presence requirement applies. Hire an attorney to compile the necessary documents.

If you are applying for green card, make sure your civil surgeon clearly indicates in the report that the vaccine in question is Not Medically...

Are you asking if it is ok to leave your employer after PWD is filed for you? If so, yes. But the new employer will have to start a new PWD.