When expand, cursor still stays in where it was (mobile app)

On mobile app,

When I Expand an item, I want my screen and cursor stays on the first item of the item I expanded so that I can see the items below it.

However, the screen and cursor stays where it was before I expanded.

Let’s say I have items like below.

While my cursor is on item A, I expand B to see B.1 and B.2.

However, right after the expand, the screen scrolls up to A where cursor stays.

My expected result is when I expand, cursor also moves to the item I expanded, and the screen also focus the item.

A

  • 1
  • 2
  • 3

B

  • 1
  • 2

I tried to explain at my best.
If you need any clarification, plz comment.