It's not servers. It's who will have the best submarine cables. A game in which Apple is not participating btw. Not even with an Elon style moon, err, low earth orbit shot.
It doesn't matter if iCloud is slow or not since most of the interactions with it are in the background. And all of it's content e.g. App Store or Apple Music are cached by CDNs which are hosted in pretty much every country.
https://blog.apnic.net/2019/04/03/the-future-of-undersea-int...