Add New Blog Entry/Post Meta Item

function myprefix_add_blog_meta_blocks( $blocks ) {
	$blocks['new_section'] = function() {
		$icon = wpex_get_theme_icon_html( 'folder-o', 'wpex-mr-10' );
		echo  $icon .'Your stuff here';
	};
	return $blocks;
}
add_filter( 'totaltheme/blog/meta_blocks/singular_blocks', 'myprefix_add_blog_meta_blocks' );
add_filter( 'totaltheme/blog/meta_blocks/entry_blocks', 'myprefix_add_blog_meta_blocks' );