It will offer even more range – up to 4,700 nm (8,700 km) – in a comfortable 2-class layout
There is an animation which contains this:
And that is 4735 miles. So now I am intensely curious what's actually possible.
Airbus is quoting the ranges in nautical miles (nm) which is typical for aircraft. The Great Circle Mapper you linked is using statute miles, which are shorter. If you switch it to be in nautical miles, you get 4115 nm, which is well within the quoted range.