Why Bismarck's final action lacks a separate battle name

Why was the final engagement with Bismarck never given a separate battle name?

The sinking of Bismarck was distinctive enough, and the open-ocean location offered no convenient nearby landmark from which to derive another name.

The sinking of Bismarck is already a sufficiently distinctive label for the final engagement. The action also took place in the open ocean rather than beside an obvious piece of land. Because naval battles are often named for the nearest geographic feature, the lack of a convenient landmark helped the descriptive name endure.