Map rendering: MapLibre GL JS 6.4.0, licensed under the BSD 3-Clause License.
Map tiles and style: OpenFreeMap / OpenMapTiles, with data from OpenStreetMap contributors.
Destination city coordinates: GeoNames cities5000 extract, licensed under CC BY 4.0.
The GeoNames extract is filtered to the supported countries and mapped only when the stored city and region resolve unambiguously.

Privacy: the map style and tiles load from OpenFreeMap's public service. Its provider or CDN may receive the visitor's IP address, the site origin, and the requested map area. Order numbers, customer names, postal codes, and full street addresses are not included in those map requests.

Sources:
https://maplibre.org/
https://openfreemap.org/
https://www.openstreetmap.org/copyright
https://www.geonames.org/
https://creativecommons.org/licenses/by/4.0/