Long time ago there was an article & discussion about US vs. non-US stock allocation. The conclusion was that you didn't really need non-US because the largest companies in the S&P 500 did a huge amount of business in non-US countries, so you automatically got that exposure.

Just a quick google look:
Microsoft generates nearly half of its revenue from outside the United States, with non-US business accounting for approximately 49.13% of its total revenue,

The Magnificent 7 stocks (Apple, Microsoft, Nvidia, Amazon, Alphabet, Meta, Tesla) generate substantial non-US revenue...
Apple Inc. (AAPL): Approximately 64% of revenue is from outside the US.
NVIDIA Corp (NVDA): About 62% of revenue is generated internationally.
Microsoft Corp (MSFT): Approximately 48% of revenue comes from non-US business.
Amazon.com Inc (AMZN): Roughly 27% of revenue is from international, or non-US, sources.

TSLA roughly 49.77% of Tesla's total revenue was generated outside the United States,

"The Magnificent 7's market cap is higher than any non-US stock market in the world."