Global Button Styles: Spacing (padding/margin)

Hi. I'm using GeneratePress (GP) Premium and GenerateBlocks (GB) free. I am creating my site and am using the GB Button block to add buttons to various pages and posts. However, I don't see where in GP I can set global rules for the button spacing (padding and margin) of either standard buttons or GB buttons.

Is there an option anywhere in GP to se global spacing for the buttons? For GB buttons, would the Pro version be required to have spacing options added for that button block? I had found this past post from Tom and tried adding the following to my functions.php, but it didn't have any effect on the button spacing.

Is there any way to set the global styles for GB buttons in GP or via a function, or is custom CSS the only way?

add_filter( 'generateblocks_defaults', function( $defaults ) {
    $color_settings = wp_parse_args(
        get_option( 'generate_settings', array() ),
        generate_get_color_defaults()
    );

    $defaults['button']['backgroundColor'] = $color_settings['form_button_background_color'];
    $defaults['button']['backgroundColorHover'] = $color_settings['form_button_background_color_hover'];
    $defaults['button']['textColor'] = $color_settings['form_button_text_color'];
    $defaults['button']['textColorHover'] = $color_settings['form_button_text_color_hover'];
    $defaults['button']['paddingTop'] = '10';
    $defaults['button']['paddingRight'] = '20';
    $defaults['button']['paddingBottom'] = '10';
    $defaults['button']['paddingLeft'] = '20';
    $defaults['button']['MarginTop'] = '20';
    $defaults['button']['MarginRight'] = '20';
    $defaults['button']['MarginBottom'] = '20';
    $defaults['button']['MarginLeft'] = '20';

    return $defaults;
} );