Apple has released a small but notable update—it's just that almost no one has it: watchOS 26.0.1 is ready, but so far it appears to be available only for the Apple Watch Ultra 3.
"Where Are You?" Feature
Apple succinctly describes the new feature: With the update (Build 23R8352), Apple Watch Ultra 3 users in Mexico can receive satellite messages and the "Find Me" feature (via 9to5mac). This means anyone traveling in an area without cellular coverage can send messages and share their location via satellite—assuming they're using an Ultra 3 in Mexico.
Technically, this isn't a major system update, but rather a feature update for new device models. Other smartwatch models compatible with watchOS 26 haven't received this update yet. However, Apple typically releases these 0.1 updates in short bursts to ensure all supported devices are back on the same version as soon as possible. Therefore, anyone without an Ultra 3 will likely receive this new feature in the coming days or weeks.
The release notes list specific restrictions for Mexico; this appears to be a regional activation of satellite service. Apple typically tests these rollouts gradually, as they depend on local approvals, network partners, or technical requirements.
For Ultra 3 users, it's worth checking the availability of version 23R8352 in the Watch app on your iPhone under "General/Software Update." For everyone else, be patient—a full rollout is likely as Apple gradually releases satellite-based features.