Once you have updated to iOS 17, you can enable cross-fade by going to Settings -> Music -> Cross-fade and turning on the corresponding toggle.
iOS even tells you about this new feature when you launch Music app for the first time after upgrading to iOS 17.
However, at the moment, iOS 17 beta 1 is very buggy and we cannot actually get this feature to work. Trying to enable the setting simply causes the Settings app to crash back to the home screen.
iOS 17 will be available to all customers this fall as a free software update for iPhone models, XS or later.
