How to add a right sidebar for Posts and Pages in Whitespace Pro. https://sridharkatakam.com/how-to-add-a-right-sidebar-for-posts-and-pages-in-whitespace-pro/

gistfile1.php

//* Unregister layout settings
genesis_unregister_layout( 'content-sidebar' );
genesis_unregister_layout( 'sidebar-content' );
genesis_unregister_layout( 'content-sidebar-sidebar' );
genesis_unregister_layout( 'sidebar-sidebar-content' );
genesis_unregister_layout( 'sidebar-content-sidebar' );

gistfile2.php

//* Unregister layout settings
// genesis_unregister_layout( 'content-sidebar' );
genesis_unregister_layout( 'sidebar-content' );
genesis_unregister_layout( 'content-sidebar-sidebar' );
genesis_unregister_layout( 'sidebar-sidebar-content' );
genesis_unregister_layout( 'sidebar-content-sidebar' );

gistfile3.php

//* Unregister sidebars
unregister_sidebar( 'sidebar' );
unregister_sidebar( 'sidebar-alt' );

gistfile4.php

//* Unregister sidebars
// unregister_sidebar( 'sidebar' );
unregister_sidebar( 'sidebar-alt' );

gistfile5.php

//* Force full-width-content layout setting
add_filter( 'genesis_site_layout', '__genesis_return_full_width_content' );

gistfile6.php

// Force content-sidebar layout setting to all singular pages
add_action( 'get_header', 'sk_force_layout' );
function sk_force_layout() {

	if ( ! is_singular() ) {
		return;
	}

	// Force content-sidebar layout setting
	add_filter( 'genesis_pre_get_option_site_layout', '__genesis_return_content_sidebar' );

}

style.css

.content-sidebar .content {
	float: left;
	width: 70%;
}

.sidebar-primary {
	background: #eee;
	float: right;
	width: 30%;
	padding: 100px 0;
	border-left: 1px solid #e2e2e2;
}

.sidebar-primary .widget {
	padding: 0 40px;
}

.sidebar-primary h4.widgettitle {
	color: #333;
	font-size: 28px;
}

.content-sidebar-wrap {
	overflow: hidden;
}

.content-sidebar-wrap .content,
.content-sidebar-wrap .sidebar {
	margin-bottom: -99999px;
	padding-bottom: 99999px;
}

@media only screen and (max-width: 960px) {

	.content-sidebar .content,
	.sidebar-primary {
		width: 100%;
		float: none;
	}

	.content-sidebar-wrap .content,
	.content-sidebar-wrap .sidebar {
		margin-bottom: 0;
		padding-bottom: 0;
	}

	.content-sidebar-wrap .sidebar {
		padding: 60px 0;
	}

}