It sounds like you are facing an issue where your ExpandingCards in a Column widget do not push down the widgets below them as expected when one of the cards is expanded. Let's go through a few things that might help resolve this issue:

1. Check the Container of Each `ExpandingCard`

Make sure that each ExpandingCard is not constrained by its parent container’s size which could prevent it from expanding as expected. If you are using Flexible or similar widgets, ensure that they are configured correctly to allow for expansion. Flexible works well if the parent widget allows for variable sizing.

2. Verify the Properties of the `Column`

Ensure that the main axis size of the Column is set to MainAxisSize.min or MainAxisSize.max appropriately:

MainAxisSize.min makes the column's height just big enough to fit its children.
MainAxisSize.max allows the column to expand to the full height of the column's parent, which might help in pushing other widgets.

3. Nested Scroll Behavior

If your ExpandingCards are inside a scrolling widget (like ListView or SingleChildScrollView), make sure the scrolling behavior isn’t interfering with the expansion. Sometimes, the parent scroll view can absorb the size change without relocating its other children.

1. Check the Container of Each ExpandingCard

2. Verify the Properties of the Column

3. Nested Scroll Behavior

1. Check the Container of Each `ExpandingCard`

2. Verify the Properties of the `Column`

ExpandingCards in Column, not pushing siblings.