Mapped as separate nodes (https://www.openstreetmap.org/changeset/180786539 https://wiki.openstreetmap.org/wiki/Mapping_addresses_as_separate_nodes_or_by_adding_to_building_polygons). In the future, you should know that the convention in France is to use address nodes for every address to avoid running into this specific issue :)

To do so in Organic Maps, use the 'Add a POI to OpenStreetMap' option in the menu and pick the 'Address' type. Either way, thank you for your contribution to OSM!