Hi there!
Thanks for contacting us.
Are you talking about the indicated space in the screenshot, please? https://prnt.sc/1x6zekg
It is getting padding value as you can see.
You can remove the main body padding value from the layout builder of your Template Options Or, use the following code in your custom CSS:
#sp-main-body {
padding: 0;
}
Note: Path towards custom CSS: Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.
Hope this helps!
Best Regards