I can’t make all the Card blocks the same height

The height of the Card block follows the length of the content inside.

You may have tried to use the Align Last Block to Bottom feature to achieve equal column heights when Card blocks are inside columns.

However, this will not work when Card blocks are inside Inner Column blocks. When the Card block is inside an Inner Column block, the Card block is the block being aligned to the bottom - and not the Button block in this case.

To achieve equal column heights, with buttons aligned at the bottom, you would need to build the design from scratch using the Columns block.

Here's how you can do this: https://docs.wpstackable.com/article/565-how-to-achieve-equal-column-heights