The issue are the libraries being used, idk how your suggestion of making a “Lite” version would help…the audio engine library is vital for the app… you know… to play music
You will either need to modify the library heavily (which makes it even more difficult to maintain) or straight impossible without rewriting your own from scratch which is I wouldn’t recommend anyone unless you have a specific reason for it.
The amount of work would be astronomical
And I would only doable if there is enough userbase for older devices that would make it profitable from a monetary perspective (consider Android 5 is a decade old)