VoiceOver is a built-in screen reader on iOS and macOS that assists users with visual impairments in navigating and interacting with elements on the screen. If VoiceOver is only speaking the first two cells and skipping the remainder of the cells, it could be caused by a few different issues.

1. The accessibility property of the cells is not set correctly, or it is not set at all. To fix this, make sure that each cell has the accessibility property set to true, and that the accessibilityLabel and accessibilityValue properties are set correctly to describe the content of the cell.
2. The accessibility property of the ListView is not set correctly, or it is not set at all. To fix this, make sure that the accessibility property of the ListView is set to true and that the accessibilityLabel and accessibilityValue properties are set correctly to describe the content of the list.
3. The accessibilityTraits property of the cell is not set correctly. VoiceOver uses the accessibilityTraits property to determine how to interpret the element. To fix this, make sure that each cell has the accessibilityTraits property set to AccessibilityTraits.cell
4. You have set the itemCount property of the ListView, but you have not set the itemBuilder property. itemBuilder is a callback function that is called for each item in the list, and it should return a widget that represents the item. Without an itemBuilder, VoiceOver will not know how to speak the items in the list.
5. The ListView is inside a SingleChildScrollView and it is not wrapped inside an Expanded widget. SingleChildScrollView does not allow VoiceOver to speak more than the visible items.

Check the above points and check whether the problem is solved or not.