Our conclusion at home (just a guess based on noticing where our Prime deliveries were coming from...) is that Amazon shut down most/all of the warehouse operations in France in line with court orders, put the staff on 'chômage partiel' so that most of the salary would be paid by the state, and then continued fulfilling orders from their warehouses across the border in Germany. Our Prime deliveries still arrived on time, Amazon still got my money, but the workers were sent home and the state pays for them to be there (mostly anyway).
Impressive and nimble by Amazon, and not sure that's a big win for labor here in the longer term.