How to get a responsive 2-3 image grid gallery for mobile

Site URL: https://www.snorkelcookislands.com/

Hey guys, is there anyone who can help me with this please?

I have a few pages where I use the Grid:Simple to display images. Looks great on desktop but on mobile, it's terrible. It would awesome for the Grid to be responsive and have 2-3 images in one row, and full bleed.

At the moment, the Grids look like the first attached screenshot in mobile.

Their pages are: https://www.snorkelcookislands.com/our-story + https://www.snorkelcookislands.com/reef + https://www.snorkelcookislands.com/lagoon

Password: snorkel

I'm also experiencing this issue with two social media images I've uploaded on this page https://www.snorkelcookislands.com/testimonials

Hope anyone can help!

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With future members, edit page > Add Code Block > Add this code

<style>
@media screen and (max-width:767px) {
.gallery-grid-wrapper {
    grid-template-columns: repeat(3,1fr) !important;
}
}
</style>

Thank you so much Tuan, absolute legend! 🤙