Apple has revealed the next major version of watchOS at the WWDC keynote and made the developer beta available for testing on the Apple Watch. The first public beta of watchOS 8 will be made available in July. Through this, you will be able to test out several new features, such as multiple timers, Focus mode, the new Mindfulness app, Photo watch faces with Portrait mode, and AssistiveTouch.
How to install watchOS 8 developer beta
Throughout this process, make sure that your iPhone is being charged with a minimum battery of 50%.