Scroll view is not scrolling after adding the content

I am trying to create a scroll view to show levels in my game.
players can select the levels and play them.
Scroll view is working with default data like when i add a single image component objects in the scroll view Content Iā€™m able to scroll the content.
But when I add my game level objects unable scroll.
Content entity has a layout group.

What could be going wrong??
Can someone help me please.

LevelsPage has the Scroll View component.:point_down::point_down::point_down::point_down::point_down::point_down:

Content entity with layout group :point_down::point_down::point_down::point_down::point_down::point_down: