Add space vertically between article boxes

Hello,

I have article boxes in my landing page and I would like to add some space between them, like on the EP department website:

I managed to add spaces between the 2 rows using a margin component but I did not manage to add space vertically.

I did not find any information about that on the documentation about landing pages and box shapes/configuration so I was wondering if you could help me?

Thank you,
Emilie