If you get the message "Your Device Isn’t Compatible with This Version" from the play store you need to install directly from your watch.
Enter the play store from your watch and search for "Lorna Studio".
The search will give you all my available watchfaces.
Sorry for the inconvenience but this is not a developer issue but is caused by the play store.
Mach Race II - Analog watchface for Wear OS
-Date/Time
-Power (Analog)
-Steps (Analog)
-AOD
Made and tested with Samsung Galaxy Watch 4.
Compatible with Wear OS devices with API Lev. 28+
For any issue please contact me . Thanks