Chinese Citizen Apply for French Visa (Passport Talent) in USA with H1B Extension Pending Approval


My H-1B visa expired on Aug 28, 2020, and my employer in the US applied for an extension for H-1B on Aug 13, 2020. Per 240 days rule, I can legally stay in the US and continue to work while my extension is pending for approval with USCIS. I applied for a French visa last week (Passport Talent) as I”m relocating to France for work. I submitted 1) my original I-797 showing my H-1B was valid until Aug 28, 2020, 2) USCIS receipt on Aug 13, 2020 showing they have received my H-1B extension application, 3) USCIS’s explanation on 240 days rule. I received an email today from French Embassy asking me to provide additional documents to prove my legal stay in the US . Any advice on what kind of documents I should provide? Thanks!