Equal column height in a website design context simply shares the same height across all available columns of a container box.

There are a lot of plugins you can find to make equal height on the Elementor column.

Here is my preferable way to make equal height on the column without plugin. No matter what widget you are using inside each column.

First you have to added this .equal-height-content CSS class and Then add this code:
.equal-height-content {
height: 100%;
display: flex;
}