How to use ScrollToAsync at the building or appearing of a content page?

Hello,

I built a grid with a lot of rows.

I added a scrollview over the grid.

When I executed the ScrollToAsync method after the building of my grid: Nothing happens

I tried to execute it in the Appearing event method of Content page, in the Sizechanged event of my scrollview (with a condition on the Height property) : Nothing happens

I included a button in the content page (outside of the scrollview) and I added in the Clicked event with the ScrollToAsync method, it works !!

Somebody can help me ?

Thank you