There is few sports were and atlethe would get better trainning or support in sports outside of the USA, but cases do exist.
Serginho Dest is born and raised in the Neatherlands to a dutch mother and a military american father, he was trainned in dutch soccer clubs since a kid all the way to being a profesional with Ajax, but decided to play for team USA
You win some, you lose some.
https://www.espn.com/soccer/united-...over-netherlandsthe-pride-of-playing-for-ajax
"Given that Dest visited America for the first time in 2014, that meant a step into the relative unknown.
Word of Dest reached U.S. Soccer via former U.S. Under-20 coach and Ajax player Dave van den Bergh, and the U.S. soon capped Dest at Under-17 level. He remembers fondly how he had limited English when he turned up to training camp at the IMG Academy in Bradenton, Florida, but the team helped him and encouraged him both on and off the field. "