Android Question NSV: nested scroll views

Hi all,
experimenting with the Expandable list view (based on the XCustomListView) I encountered a limit we all know from the beginning: nested scrolling views are not allowed/good idea.

I started to think how to signal the sv in the outer Expandable list to stop listening to gestures in order to give an inner Expandable list the opportinity to scroll its content.
Then I found a few references to something that seems to be around since API 21: NSV.

Here a few links:
https://developer.android.com/reference/android/support/v4/widget/NestedScrollView
https://developer.android.com/reference/android/support/v4/view/NestedScrollingChild
http://www.devexchanges.info/2016/07/nested-scroll-views-in-android.html
https://www.androiddesignpatterns.com/2018/01/experimenting-with-nested-scrolling.html

So, I have a couple of questions:
1. is there any chance we will have a class implementing the NSV mecchanism in the near future?
2. will this eventual class be compatible with iOS (I mean does iOS have any counterpart to NSV)?

And the most important question, will a NSV-based solution be regarded as a poor-UX one?

TIA