Yes, if the different country embassy/consulate can accommodate your H4 visa interview.

It is best to consult with an immigration lawyer to review all viable options for your specific case.

No, an H4 visa holder is for a spouse of a US H1 visa holder. With a H4-EAD visa, a person may not in Canada and outside US.

You wrote ..."we never got any notice about the interview appointment.". The proper procedure is to call USCIS customer service to update your case...

The review of your wife's immigration history would be necessary to provide any advice. Consult with an immigration lawyer for further guidance.

The process is long, and sometimes complex. It is recommended you hire an immigration lawyer to review your immigration status and discuss options....

No, work a side hustle like Uber or door dash or painting houses is not authorized. You must only work for your H1B employer.

A false case 498a dowry case in India may not affect your pending U-visa and EAD application.

Yes if 485 EB2 was approved while in India on H1B, have received green cards by mail. You can enter United States using the Green cards.

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Yes, with TPS approval and employment authorization expired on September 8, 2021, re-registration is allowed.