At the moment, EasyRetro does not have a feature to hide only one specific column. However, you can use a simple workaround to get a similar result.
Here’s how:
Step 1. First, hide all the cards on your board. This will hide the information in all columns.
Final Step. After hiding the cards, you can choose which column you want to show again.
Go to the column you want to reveal.
Click the three dots (⋯) button.
Select "Show column cards".
This way, you can keep other columns hidden while showing only the one you need.