I was surprised to zoom in on Olympic Dam and not see anything measured given it is a uranium mine. But I guess its measured by the people
More is measured than is passed on, that is true.
The entirety of Fiji,and most of Mali should ideally also be online / available - but can be a tricky find (ditto many other places about the globe).
Before and after Pokhran-II India, (1998) should also be an interesting study that might be tricky to hoard the data for.