On Google Maps many places have incomplete map data. If you get a bit farther out of Accra, Ghana, quite a few streets will just not be there. That was quite obvious when my sister was there for a few months two years ago but it seems to have gotten somewhat better. Accra is not in the middle of nowhere, it’s a major and important West African city (and 2.3 million people live there).
Maps are imperfect images of reality and keeping them current costs a lot of effort. Depending on who is likely to use them maps will be more detailed in certain places – especially maps that aspire to provide global coverage.
In Accra its missing roads in the suburbs, next to the place I grew up (a small town in Bavaria) its a few (but not all) footpaths in the park missing and a bad match of satellite image and map data (with streets being a few meters off in different directions, a problem that strangely doesn’t seem as prevalent in Accra).