Hello,
Unfortunately, there is no global option. You can change it by additional customization.
1) Find function etheme_page_config (xstore/framework/sidebars.php) and add the following code as mentioned on the screenshot
$layout = apply_filters('etheme_page_config', $layout);
2) Add the following code to child theme functions.php
add_filter('etheme_page_config', 'custom_etheme_page_config', 20, 1);
function custom_etheme_page_config($layout) {
$layout['sidebar-size'] = 8;
$layout['content-size'] = 4;
return $layout;
}
Screenshot https://prnt.sc/nvyfu6
Regards