Amazfit Watch faces

Hello, I have an Amazfit T-rex watch, model A1919. I really want to make my own watch faces for it, but I can't find normal instructions on how to do it. If I make one with Zepp's official watch face maker and extract the source.bin file from it, both the amazfaces page and my watch label it as ...

I don't think the official watchmaking site is compatible with your watch. Documentation is difficult to come by. You basically need to learn by doing. Or learn by unpacking existing watchfaces for your watch.

I think Facemaker or the AmazFit WatchFace editor for Windows by SashaCX75 are your only ...