Apple has released watchOS 6.2.8 beta 2 only to developers enrolled in the company’s Dev program. Apple has skipped a few point releases and jumps from watchOS 6.2.6 to watchOS 6.2.8 right away. The focus will almost always be on bug fixes.
WatchOS 6.2.8 beta 2 can be downloaded by developers directly from the Watch app on iPhone, going to General-> Software update. This new beta does not bring additional functions, but improves performance and fixes some bugs.