It shows as 'Passports/Travel Documents (Multiple) ’ in documents upload page. Does (Multiple) means we need to upload multiple copies or multiple identification documents ?
You must submit a legible copy of your valid travel document which you will use to travel.
If you have a passport, you must provide a copy of:
the page that shows your birth date and country of origin, and any pages with stamps, visas or markings.
If you do not have a passport and must use another travel document, it must be issued by a government and include your:
date of birth,
citizenship or residency status,
expiry date (if applicable).
no, though it might be better to submit a copy of valid US visa (or I797 if visa has expired)
I-94 is for US immigration purposes only so you don’t need to submit a copy of the I-94.