Hello Frans S;
Thank you for reaching out;
I only upgraded the classification to "highway=track" to match the surrounding area like:
https://www.openstreetmap.org/way/1159985372
https://www.openstreetmap.org/way/1163917665
and for the navigation system is available from "highway=" unclassified" to "highway=" track"
Example:
https://www.openstreetmap.org/directions?engine=fossgis_osrm_car&route=13.0379%2C22.1830%3B13.0351%2C22.1891#map=17/13.03562/22.19128
Regards
Amany_Osama