I797B eligible for dropbox?

My employer had filed the H1B extension petition mistakenly when I was outside of USA. I traveled back to USA as I had Valid Visa. Now I received the I797B approval notice ie., without i94. So I have to leave united states for stamping, am I eligible for dropbox ?

Previous Visa Expiry : 1st May 2020

Yes, in your case, you would be as the expiry of your visa is less than a year.

Thank you.

Usually for H1b extension, we use to get i797A notice. But I received i797 approval ie., this notice will be issued during our first H1b approval. so for dropbox i797A or i797B does not matter?