WP template code to query a post type according to terms from a custom taxonomy -- and loop through to divide the posts by term

query-loop-over-terms.php

<div class="page-content">

<?php
	// Specify the taxonomy and post type for the queries.
	
	$fq_post_type = 'xxxxpost_typexxxxx';
	$fq_taxonomy = 'xxxtaxonomyxxx';

	$term_args = array(
		'orderby' => 'title',
		'order' => 'ASC',
	);

	$custom_tax_terms = get_terms( $fq_taxonomy, $term_args );

	if ( !empty( $custom_tax_terms ) ) {
		
		foreach ( $custom_tax_terms as $tax_term ) {
			$term_heading = $tax_term->name;
			$query_term = $tax_term->slug;
		
			$args = array(
				'post_type' => $fq_post_type,
				'posts_per_page' => -1,
				'orderby' => 'title',
				'order' => 'ASC',
				'tax_query' => array(
					array(
						'taxonomy' => 'genre',
						'field' => 'slug',
						'terms' => $query_term,
					),
				),
			);
		
			$fq_tax_query = new WP_Query( $args );
		
			if ( $fq_tax_query->have_posts() ) :
			
				echo '<h3 id="' . $query_term . '" class="book-archive-title">' . $term_heading . '</h3>';
				
				echo '<section class="genre-group">';
			
				while ( $fq_tax_query->have_posts() ) : $fq_tax_query->the_post();
					
						get_template_part( 'content', get_post_type() );

				endwhile;
				
				echo '</section>';
				
			endif;
		}
	}
wp_reset_postdata(); ?>

</div><!-- .page-content -->