Three things people mix up
Fund domicile, exchange listing and trading currency are different attributes. A fund trading in USD is not necessarily U.S.-domiciled.
Why domicile matters
Domicile can affect the tax layer inside or around a fund and can affect estate-tax exposure. The result depends on the investor, fund and applicable law.
Use CIL
Use the ETF Structure Explorer to understand the variables, then verify the actual fund by its legal documents and ISIN.
Before marking this stage complete
Make sure you understand the concept and have checked any live information that applies to your own situation. Completion in CIL is a personal progress marker, not verification by CIL.