Why align-items: stretch, is not working in this case

I want all the cards to have the same height, because they have different titles sometimes might be that a card has 2 rows title hence more height, but I want the other to stretch to it, but it is not working
Here is a simple sandbox
https://codesandbox.io/p/sandbox/card-ys3pl3?file=%2Fstyles.css%3A75%2C1