You'll need watchOS 8.0 or later to enjoy 2ndLine on your Apple Watch.
For seamless usage of 2ndLine on your Apple Watch, ensure that your watchOS is updated to version 8.0 or newer.
Checking Your watchOS Version:
Open the Settings app on your Apple Watch.
Tap on "General."
Scroll down and tap on "About".
Your current watchOS version will be displayed here.
Additional Notes:
Make sure to keep your Apple Watch's watchOS version up-to-date to access the latest features and improvements offered by 2ndLine.
Before installing or updating 2ndLine on your Apple Watch, ensure that your device is running watchOS 8.0 or later to avoid any compatibility issues.