Gallery is displaying vertically

Hi All,

Please see this page: https://wordpress-527831-1773800.cloudwaysapps.com/line-card/

Under ACDC, you can the gallery I’ve added using simply gallery blog is displaying vertical. There is no row or horizontal images.

Is it possible to display these images in the gallery like the guternberg galleries that you see next to them?

Thanks,
dave

The page I need help with: [log in to see the link]