Yanks are like Queenslanders.. A sport ⚾️ played in their own Country called a World Series..
It’s called the World Series because the original sponsor was the News of the World Newspaper . The rest of the sports piggy backed because it was a good marketing tool .
I found this online which suggests something different:
“The Origin of the Name 'the World Series'
For many years, it was believed that the name came from the fact that the original series was sponsored by the New York World Telegram newspaper, thus becoming known as the ‘World’s Series’. However, popular as this explanation may be, it’s not actually true and although the newspaper did report the results of the games, it had nothing to do with the naming of the competition.
The real reason behind the name is thanks to Barney Dreyfuss who was the owner of the Pittsburgh Pirates. In 1903, he wrote to the owner of the Boston Red Sox challenging them to a ‘World’s Championship Series’. The Pirates were the best team in the National League and the Red Sox were the best in the American League.
The games went ahead and Boston won the series five games to three. Over time, the 'World’s Championship Series' name has been shortened to the World Series and has been played every year apart from 1904 and 1994.”
https://www.rulesofsport.com/faq/why-is-the-world-series-called-the-world-series-if-only-american-teams-play.html