DropBox Eligibility H1 and H4 visa in india (Last Stamping in india 6 years back)

Hi All,

Need some information on DropBox Eligibility H1 and H4 visa in india, me(H1) and my wife’s(H4) had our last stamping in india 6 years back, i am finding conflicting information and about confused about the 48 month period, I got H1B extension approval last year(april 2023) and visa valid till 2026. DO WE QUALIFY FOR DROP-BOX OR DO WE NEED TO GO TO IN-PERSON VISA INTERVIEW ?? , If Eligible for DROP-BOX, can H1 and H4 both eligible or only H1B.

Thank you and appreciate your help.

Let me know if there is still a confusion at your end.