The data sources listed for UFOs are from US and Germany:

National UFO Reporting Center (NUFORC) witness reports (US, via the CC0 TidyTuesday project, 2023-06-20)

and

GEP e.V. UFO/UAP Falldaten (Germany, Zenodo 18071015, CDLA-Permissive-1.0), 1925–2025.

They are unlikely to include data from many other locations.

Maybe they just like the food, but we pull from sources that only show reports from these countries right now which is why it looks that way. In the future people will be able to submit their own reports and pindrops on the map!