Most of my traveling outside of the US has been in Canada, Mexico, central and South American and the Caribbean. You can find those chains in most of those countries.
I have been to London and found plenty of choices for Hilton. Looking at our bucket list for the next few years (we started traveling a lot post 2021), I’m looking at Hyatts in Spain (Barcelona, Seville and Madrid), in Australia and Japan.
It’s not until I get to countries in Africa where I can’t find many chains. In big cities in Europe, Australia and Asia, the American chains are ubiquitous.