Using Keyman Developer, I designed Dogra script keyboard. (Unicode Range: 11800-1183B)
This keyboard worked well on my computer.
So, I added Noto Serif Dogra font in my KPS package and made a KMP file to use. But when installing my Dogra keyboard on my Android phone, the keyboard did not display letters.
So, I added Noto Serif Dogra font in my KPS package…
When you added the .ttf font to the kps package, did you assign the font as “keyboard font” and “display font” on this step? This will be on the keyboards tab of the Keyman Developer package editor: