Here's a bit more information: https://github.com/matkoniecz/illegal-use-of-OpenStreetMap/b...

When I open the link at the top on my desktop, I see "© Mapbox © OpenStreetMap Improve this map" in the lower-right corner.

As the github link says,

> It has no real attribution when opened on a mobile or when browser window is resized to a smaller one.

It's a while since I've used Mapbox but they were very strict and diligent about including OSM attribution back when I was building apps with it (2018). Have they really changed that drastically?