Unable to remove padding across multiple sections.??

After the first 2 sections on this page, there seems to be padding down the right-hand side which i cant seem to eliminate.

https://www.persiancatsandcarpets.com.au/nbn-updates

This particular page on the website is still yet to be updated to fluid engine. Could this be causing the issue? I'd like to keep it on the current version as moving to fluid engine will involve a fair redo of the page.

This code is the problem:

main>article, footer {
    display: flex;
    flex-wrap: wrap;
}