Does a Visa need to be stamped, in order to be valid?

I am currently in US under H1B.

My company is allowing me to remote in from my home country (South Korea), so I am planning to fly back and remote from there for a bit.

However, My current Visa stamp has been expired and My have been approved for my visa extension.

But I wasn't able to get my visa stamped, so my approval letter is just sitting there.

Also, US Embassy in South Korea has stopped taking appointments for VISA so I won't be able to get the visa actually stamped in my passport until they start taking appointments again.

With these circumstances, If I work remotely from Korea, I will be working with Expired H1B Visa Stamp in my passport and approved Visa Extensions without getting stamped.

Is this okay with maintaining my status under H1B?

submitted by /u/pyg1991
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source https://www.reddit.com/r/immigration/comments/gba80h/does_a_visa_need_to_be_stamped_in_order_to_be/