How to change Android version?

Question

Java

How to fake android version for app?
Changing build.prop is not an option.
There is twrp, magisk, xposed, root
The Meizu M6 Note phone itself
On w3bsit3-dns.com searched for nothing, tried various modules, nothing helped.

Answer 1

To change the displayed version - build.prop
For both applications - no way. They interact with the Android API, the level of which cannot be changed. If you put API level 28 on the 5th android, then the functions from the 9th android will not appear there.
https://source.android.com/setup/start/build-numbers
What do you need? Isn't it easier to reflash?

There is twrp, magisk, xposed, root