As reported by MacRumors, Apple has today released tvOS 18.2.1 to the public.
According to an Apple Support Document, tvOS 18.2.1 resolves an issue with data synchronization across devices:
This update addresses an issue where data may not sync correctly across devices.
At this time, we are not aware of any other changes in tvOS 18.2.1.
To install tvOS 18.2.1, on Apple TV 4K or Apple TV HD, go to the Settings channel, then navigate to the System section near the bottom. From here, navigate to Software Updates under Maintenance, then select Update Software and Download and Install. Wait for your Apple TV to download the update. Do not disconnect or unplug your Apple TV until the update completes.