I find it interesting that there hasn’t been a dispute between Apple and Alphabet when it comes the use of the word Messages. Apple Messages (named Messages) saw light in 2007, while Google Messages (also named Messages) saw light in 2014. They both have similar function, but are exclusive to the OS they run on. I think that is the reason Google Messages might never show on the App Store (though it would give Alphabet the upper hand if it were to be).

I understand there is Apple Maps and Google Maps too, which is also puzzling. On this one Google was first.