Hi I have 5+ years of experience as a python developer. My recent projects have been into cross - platform (android, IOS, Windows, Linux, OSx..) app developement using kivy ( cross platform GUI platform for python). I compile all my apps using buildozer , using the vitrual image as provided by kivy. I have the following seggestions regarding your problem
While running the buildozer command should be executed as follows
buildozer android debug deploy run logcat (this will show you all the compiling errors and warnings)
post that you can install adb for the logs, which will show you the errors regarding the crashing of the app.
I have this whole setup on my laptop, therefore if you can send me the app codes I can compile and fix the errors
Please feel free to dicuss