For what it's worth, when I hear "the West" I think of what would on a global, historical scale be known as the "far west", i.e. mainly north and western Europe. (The "near west" would be the cultures just to the east of the Mediterranean, I suppose.)

I would never bunch Oceanic or Asian cultures in there.

I'm surprised to hear other people use it in a broader sense. At some point one is talking about cultures that are so different it's no longer meaningful to generalise across them.

I suppose that's because they are heavily influenced by western European countries. Two of the countries you mentioned are part of the British Commonwealth.

  > a term that always bothered me given how the world is round

Historical quirks of language are everywhere. Atheists still say Good Bye (God by with you) when they part, and say Bless You when you sneeze.

Yeah, Twitter spaces is a tiny niche. I know nobody who has used them for anything, but almost everybody uses Telegram. And I'm "In the West".