WordPress search post type by post type. (Beaver Builder template file in this exemple)

search.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit; // Silence is golden.
}
?>
<?php get_header(); ?>

<div class="fl-archive <?php FLLayout::container_class(); ?>">
	<div class="<?php FLLayout::row_class(); ?>">

		<?php FLTheme::sidebar( 'left' ); ?>

		
		<?php
			$search_query = get_search_query();
			
			$posts_type = get_post_types( array( 'public' => true, '_builtin' => false ) );
			unset( $posts_type['fl-builder-template'] );
			$posts_type = array_merge( array( 'post', 'page' ), $posts_type );
			
			foreach( $posts_type as $post_type ){
				
				$args = array(
					'post_type'			=> $post_type,
					'posts_per_page'	=> -1,
					'orderby'			=> 'name',
					's'					=> $search_query
				);
				$the_query = new WP_Query( $args );
						
				if ( $the_query->have_posts() ) {
					$post_type_info = get_post_type_object( $post_type );
					?>
					<h2>Résultat(s) pour les éléments de type : <?php echo $post_type_info->labels->name; ?></h2>					
					
					<div class="fl-content <?php FLLayout::content_class(); ?>"<?php FLTheme::print_schema( ' itemscope="itemscope" itemtype="https://schema.org/Blog"' ); ?>>
					<?php
					while ( $the_query->have_posts() ) {
						$the_query->the_post(); 
						
						get_template_part( 'content' );
					}
					?>
					</div>
					<?php
				}
				
				wp_reset_postdata();
			}
			?>


		<?php FLTheme::sidebar( 'right' ); ?>

	</div>
</div>

<?php get_footer(); ?>