MacRumors published a story that Apple has released watchOS 10.0.2 for Apple Watch Ultra 2 and Series 9.

Apple Releases watchOS 10.0.2 for Apple Watch Ultra 2 and Series 9

Apple today released watchOS 10.0.2, a minor update to the watchOS 10 operating system that came out earlier this month. watchOS 10.0.2 comes five days after the release of watchOS 10.0.1, another minor update.
According to Apple's release notes for the update, watchOS 10.0.2 includes bug fixes and important security updates for the Apple Watch.

Apple Releases watchOS 10.0.2 for Apple Watch Ultra 2 and Series 9