Bonjour. I found your channel and love your content. I was in Paris in March 2020 and have leftover metro tickets. Would they still work? I am returning to Paris in September 😀
Up to my knowledge, there is no Navigo counter at Bercy Seine. The nearest one is at the metro station Cour Saint-Emilion 10-minute from there by walk. FYI, this bus station is creepy and toilets are a shame...