Bookworm - Brand image on Single product page

functions.php

function bookworm_wc_single_product_author() {

    global $product;

    
    $product_id = $product->get_id();

    $brands_tax = bookworm_get_book_author_taxonomy();
    $terms      = get_the_terms( $product_id, $brands_tax );
    $brand_html = '';

    

    if ( $terms && ! is_wp_error( $terms ) ) {

        foreach ( $terms as $term ) {
            $thumbnail_id   = get_woocommerce_term_meta( $term->term_id, 'thumbnail_id', true );

            if ( $thumbnail_id ) {
                $image_attributes = wp_get_attachment_image_src( $thumbnail_id, 'full' );

                if( $image_attributes ) {
                    $image_src = $image_attributes[0];
                }

                $image_src = str_replace( ' ', '%20', $image_src );
                $brand_img = '<img src="' . esc_url( $image_src ) . '" alt="' . esc_attr( $term->name ) . '" />';
            } else {
                $brand_img = '';
            }

            $brand_html .= '<a href="' . esc_url( get_term_link( $term ) ). '">' . $brand_img . '</a>';
        }
    }

    $author_name = bookworm_wc_get_product_author();

    if ( ! empty ( $author_name ) ) :
    ?><div class="d-flex align-items-center" style=" margin-right: 20px; "><span class="font-weight-medium"><?php echo esc_html__('By (author)', 'bookworm');?></span><span class="ml-2 text-gray-600"><?php echo wp_kses_post( str_replace( '</a><a ', '</a>, <a ', $author_name ) ); ?></span></div><?php
    endif;
    
    print_r($brand_html);

    ?> 
    <div class="author-single-desc" style="width: 100%; margin-top: 10px;">
        <?php echo $terms[0]->description; ?>
    </div>
    <?php
}