[cal] and [kcal] tags do not work on galaxy watch 4

Watch Face Studio
1

Are there any other ways to display these values on a watchface?

2

Hello,

Unfortunately, the watch face of the Wear OS platform is difficult to explicitly provide data provided by certain apps, such as weather or health. Remember that a watch face made with WFS can also be downloaded to other manufacturers’ devices.
Instead, the Wear OS and WatchFaceStudio provide the ability to place complication slots in the watch face so that data provided by various third-party apps can be selected by the user.

Please check below documents for a better understanding.
Wear OS’s complications and Complication of WatchFaceStudio

Thank you.