Apple has released watchOS 26.4, a relatively minor update to its smartwatch software. The new version adds emoji features, bug fixes, and security updates. A notable change in the Workout app allows users to start a workout by tapping the icon or pressing the “Play” button, making it easier to begin exercise sessions.
Source: https://www.gearpatrol.com/tech/apple-watch-watchos-26-4-workout-feature