Apple has today seeded the fourth beta of watchOS 2.2. This update is released two weeks after the last one. In this version we see the ability to connect multiple Apple Watches to one iPhone. Other than that there are no other obvious changes. We guess that there’s mainly bug fixes and improvements.
To get this update make sure that your iPhone is on the latest beta of iOS. Then go to the Watch app > General > Software update > watchOS 2.2 beta 4.