Animating the Layout width and the Size do not work

I have a cube shape and I’ve rounded the corners to 24. I want to animate the width while keeping the rounded corner proportionate. In After Effects you can do this by animating the size. I see there is an option for that in Figma but after setting the key frames nothing happens. Animating the Layout width also does the same thing. I can even actively move the width but when it comes to animating it once the keyframes are set it just says at its starting width. It just stays at its current width. Anyone else have this problem?