Make sure you have installed Brand Premium plugin and have activated Brand Spacing and Dimensions in Settings > Brand Premium > Add-ons.
Now, to find your spacing options go to Appearance > Customizer. You can find new sections in the Layout panel and new options in the sections within it.
In the Layout > Sidebar section you can customize the appearance of the sidebar if it is active.
Sets the width of the sidebar, using percentage.
Sets the spacing between the sidebar and the main content, using percentage.
Sets the vertical space between sidebar widgets. Use pixels or percentage.
Sets the padding on the four sides of each widgets, using pixels or percentage.
In the Layout > Footer section there are four new options to set the padding of the footer, using pixel or percentage. Add px or % symbol to the number.