Answer:
The first and only fact is that there are no kangaroos in sandy deserts.
Kangaroos need regular water to drink. Non-Australian websites propound the myth that kangaroos do not need water, but they do, just as they need fresh vegetation, which is not readily available in the desert.
Kangaroos are able to live in semi-arid areas, including semi-arid deserts, as long as there is fresh vegetation and access to waterholes.