Yes, make the additions to OpenStreetMap (https://www.openstreetmap.org/). The more you add, the better the map becomes for everyone.
Very easy to use app for adding info to OpenStreetMap from a mobile device: https://f-droid.org/en/packages/de.westnordost.streetcomplet...
Full editor of everything OpenStreetMap on a mobile device (but does have a steeper learning curve than StreetComplete above) https://f-droid.org/en/packages/de.blau.android/