There are so many like KIVY, PyMob. Try to develop a simple Hello world app in each platforms (mentioned buildozer above) in python and see which one fits you best. ALL THE BEST!!🙂
It's simple, just learn C#, java or kotlin. A friend of mine spent almost 5months writing android apps in kivy and it got rejected by playstore
Check out buildozer!
Follow up: do some of those platforms also allow the development of iOS apps in python?
Any specific reason why the app got rejected? I don't think so, it's rejected because it's developed using Python