There have no post attributes option for custom post type in Beaver Builder theme. In this tutorial I am sharing the steps for it.

Step 1: Adds Post Attributes in all custom post

Open the functions.php file of your beaver builder child theme and add this snippet
Adding Post Attributes in all post types

/**
 * Adding Post Attributes in all post types
 */
add_action( 'init', function(){
	$cpts = get_post_types( array( 'public' => true, '_builtin' => false ) );
	if( $cpts )
	{
		foreach( $cpts as $cpt )
		{
			if( ! in_array( $cpt, array( 'fl-builder-template', 'fl-theme-layout' ) ) )
			{
				add_filter( "theme_{$cpt}_templates", 'wpbw_cpt_post_attributes', 99 );
				add_post_type_support( $cpt, 'page-attributes' );
			}
		}
	}
}, 99 );

function wpbw_cpt_post_attributes( $post_templates )
{
	$post_templates['sidebar-left'] 	= __( 'Left Sidebar', 'fl-automator' );
	$post_templates['sidebar-right'] 	= __( 'Right Sidebar', 'fl-automator' );
	$post_templates['full-width'] 		= __( 'Full Width Content', 'fl-automator' );
	$post_templates['no-header-footer'] = __( 'No Header/Footer', 'fl-automator' );

	return $post_templates;
}

add_action( 'wp_head', 'wpbw_cpt_layout' );
function wpbw_cpt_layout()
{
	$tpl_attr = get_post_meta( get_the_ID(), '_wp_page_template', true );

	if( empty( $tpl_attr ) )
		return;

	if( $tpl_attr === 'no-header-footer' ) {
		add_filter( 'fl_topbar_enabled', '__return_false' );
		add_filter( 'fl_fixed_header_enabled', '__return_false' );
		add_filter( 'fl_header_enabled', '__return_false' );
		add_filter( 'fl_footer_enabled', '__return_false' );
	}

	if( $tpl_attr === 'sidebar-right' )
	{
		add_filter( 'fl_theme_mods', 'wpbw_cpt_layout_sidebar_right', 99 );
	}

	if( $tpl_attr === 'sidebar-left' )
	{
		add_filter( 'fl_theme_mods', 'wpbw_cpt_layout_sidebar_left', 99 );
	}

	if( $tpl_attr === 'full-width' )
	{
		add_filter( 'fl_theme_mods', 'wpbw_cpt_layout_full_width', 99 );
	}
}


function wpbw_cpt_layout_sidebar_left( $mods )
{
	$mods['fl-blog-layout'] = 'sidebar-left';
	if( get_post_type() == 'product' )
		$mods['fl-woo-layout'] = 'sidebar-left';

	return $mods;
}

function wpbw_cpt_layout_sidebar_right( $mods )
{
	$mods['fl-blog-layout'] = 'sidebar-right';
	if( get_post_type() == 'product' )
		$mods['fl-woo-layout'] = 'sidebar-right';

	return $mods;
}

function wpbw_cpt_layout_full_width( $mods )
{
	$mods['fl-blog-layout'] = 'full-width';
	if( get_post_type() == 'product' )
		$mods['fl-woo-layout'] = 'full-width';

	return $mods;
}

Step 2: Adds custom css for full width layout

Open the style.css file and add this CSS

Full Width for Beaver Page Builder

.fl-builder.fl-full-width .container {
	padding-left: 0;
	padding-right: 0;
	max-width: 100%;
	width: auto;
}

.fl-builder.fl-full-width .container > .row,
.fl-builder.fl-full-width .container .fl-content {
	margin: 0;
	padding: 0;
}

Now add/edit any post type and select the correct layout from template drop down list under post attribute section. Publish/Update the post and see the output at front end.

Welcome for any comment.