u/Beneficial-Cry6802

i have fire boltt pheonix pro watch on which i am getting the face made by some one on dafit app and i need some way to get into the os and somehow want to apply those watch face design and it wallpaper as i wish , but the app only provide wallpaper change but i need all customization . the fire boltt watch runs on RTOS , do any one know how to do that if any one had done it