Add Thumbnail Images for Brands to the Single Product Page in WooCommerce https://wpsites.net/wordpress-tutorials/display-all-brand-thumbnails-on-product-page/

WooCommerce-Brands.php

add_action( 'woocommerce_single_product_summary', 'display_all_brand_thumbnails_on_product_page', 25 );
function display_all_brand_thumbnails_on_product_page() {
    global $post;

    $brands = wp_get_post_terms( $post->ID, 'product_brand' );

    if ( ! empty( $brands ) && ! is_wp_error( $brands ) ) {
        // Output container for brand logos
        echo '<div class="product-brand-thumbnails">';

        foreach ( $brands as $brand ) {
            $thumbnail_id = get_term_meta( $brand->term_id, 'thumbnail_id', true );

            if ( $thumbnail_id ) {
                $image_url = wp_get_attachment_image_url( $thumbnail_id, 'full' );

                if ( $image_url ) {
                    echo '<img class="brand-logo" src="' . esc_url( $image_url ) . '" alt="' . esc_attr( $brand->name ) . '" />';
                }
            }
        }

        echo '</div>';
    }
}