Force a page layout for post type in Astra theme

functions.php

<?php

add_filter( 'astra_get_content_layout', 'child_astra_post_type_content_layout');
/**
 * Force the container layout for post type in Astra theme
 */
function child_astra_post_type_content_layout ( $layout ){
	
	// Apply only to specific post types
	if ( is_singular( array( 'fl-builder-template' ) ) ) {
		
		// Define the layout. Valid values: 
		// page-builder (Full Width / Stretched) 
		// plain-container (Full Width / Contained)
		// content-boxed-container (Content Boxed)
		// boxed-container (Boxed)
		// default (Customizer setting)
		$layout = 'page-builder';
	}
	return $layout;
}