How to make galleries full-width in Margot template?

Hi, I'm currently in the process of changing templates on my website, but I've been struggling to figure out how to make the grid gallery in my Margot template full-width (mobile and desktop). There's a weird white margin on both sides that looks clunky to me. Any CSS or settings help? I'm not sure how to copy the link as it's not live, but please let me know anything I can do to make it easier to get some help. I did include a screenshot. Thanks so much!

Here is a tutorial on creating full width blocks including galleries, including blocks in Margot, (a member of the Brine Family)

https://bigcatcreative.com/blog/how-to-create-full-width-sections-in-squarespace