There are two possible solutions:
1. Use the following custom code to overwrite footer spacing:
.footer-column.footer-column-1 {
margin-bottom: 0;
}
.footer-sidebar.widget-area {
padding-bottom: 0;
}
2. Remove “background-color” and “stretch row” from the footer section that is set in the WPBakery editor (https://prnt.sc/3lmJGY1MooY6), configure footer background color and color-scheme via theme settings => footer => color-scheme options (https://prnt.sc/ClteoLYOPwZZ) and reorganize footer rows spacing using WPBakery padding\margin options.
Kind Regards