Hi Christos,
Looking at the Clients Page, I can see multiple WP columns Blocks and looking at them on a smaller screen, the evident spacing is this: https://share.getcloudapp.com/kpu8kd56
Is this the weird spacing you’re referring to?
If yes, this Spacing is coming from the default margin of the WP Columns Block. You would need custom CSS to fix this.
The more efficient way is to use a Grid Block as mentioned by Leo. This Block would give you more control over the paddings and margins to prevent this from happening.
Hope this clarifies! 🙂