buildozer.spec :
# (string) Presplash animation using Lottie format.
# see
https://lottiefiles.com/ for examples and
https://airbnb.design/lottie/# for general documentation.
# Lottie files can be created using various tools, like Adobe After Effect or Synfig.
#android.presplash_lottie = "path/to/lottie/file.json"
I think also this must be set True
# (bool) Enable AndroidX support. Enable when 'android.gradle_dependencies'
# contains an 'androidx' package, or any package from Kotlin source.
# android.enable_androidx requires android.api >= 28
#android.enable_androidx = False