Apple Intelligence is a little easier to try out if you're not in the U.S. Unfortunately, users in the European Union and China are still fully excluded.

As noticed by 9to5Mac, the latest developer beta of iOS (iOS 18.1 Beta 3) no longer requires the user to set the device region to the U.S. The only thing that is required is for the user to set device language and Siri language to the U.S. English language.