Hello @Kalai1 and welcome to the Community. Unfortunately, not all the Sense clock faces are available for the Sense 2. Fitbit didn’t give developers full access for their clock faces.
Laurie | Maryland
Sense 2, Luxe, Aria 2 | iOS | Mac OS
Take a look at the Fitbit help site for further assistance and information.
Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
The easiest way to check is to go to the online gallery and search for the clock face , click on it and it will tell you (perhaps best in landscape mode) at the top on which watches it can be installed.
Author | ch, passion for improvement.