When embedding content within a Scroll View container, that content gets displayed within a scrollable area.

However, as you design a screen, you’ll only be able to see what’s above the fold.

Therefore, when creating content for a screen that users will have to scroll through, it’s best practice to create a Component from the contents within the Scroll View container.

This way, you can see the entirety of your vertical or horizontal content on the canvas as you design it, while being able to see how it will fit within your screen at the same time.