In Heidelberg there are several newly built neighborhoods with several new streets.
Although there should be enough rides recorded for these streets, the map view does not represent this. I guess, this is because these streets are not known to the service that generates the polygons.
See for example under https://simra-project.github.io/map.html?region=mannheim at the streets
- Carl-Friedrich-Gauß-Ring, Heidelberg
- John-Zenger-Straße, Heidelberg