As a warning regarding API stability:

I am going through Poor Maps source and adjusting API (mainly by adding methods) to make it easy to use in practice. Already now some methods have been added and I expect that more are needed while porting. So, give me few days to work on it and make the API better.

When done, what you should expect when porting the app to MapboxMap is a major reduction in the app code. For example, all tiles (vector and raster) are downloaded by QMapboxGL and there is no code expected for handling these downloads on the app side - just define the style and let MapboxMap do its magic