MacRumors published a story that Apple has released the first beta of watchOS 8.6 to registered developers.
Apple Seeds First Beta of watchOS 8.6 to Developers
Apple today seeded the first beta of an upcoming watchOS 8.6 beta to developers for testing purposes, with the new software coming three weeks after the release of watchOS 8.5.
Apple Seeds First Beta of watchOS 8.6 to Developers
To install watchOS 8.6, developers will need to download the configuration profile from the Apple Developer Center. Once installed, watchOS 8.6 can be downloaded through the dedicated Apple Watch app on the iPhone by going to General > Software update.