Regarding Drop Box Eligibility

@anil_am22 My H1B was denied on July 30, 2019. After that, I moved to Canada on WP. and applied for B1/B2 in Nov 2020 and got rejected.
Now my H1B transferred in consular processing with my client. Can you please let me know if I am eligible for a drop box?
Are there any Visa dates available in india?