Show Dokan vendor Biography in single product tab

gistfile1.txt

/**
 * Add a custom product data tab
 */
add_filter( 'woocommerce_product_tabs', 'woo_new_product_tab' );
function woo_new_product_tab( $tabs ) {
  
  // Adds the new tab
  
  $tabs['test_tab'] = array(
    'title'   => __( 'Vendor Bio', 'woocommerce' ),
    'priority'  => 50,
    'callback'  => 'woo_new_product_tab_content'
  );

  return $tabs;

}
function woo_new_product_tab_content() {

  // The new tab content
	
		global $product;
        $seller = get_post_field( 'post_author', $product->get_id());
        $author  = get_user_by( 'id', $seller );
        $vendor = dokan()->vendor->get( $seller );

        $store_info = dokan_get_store_info( $author->ID );

        if ( !empty( $store_info['store_name'] ) ) { ?>
            <span class="details">
                    <?php printf( 'Sold by: <a href="%s">%s</a>', $vendor->get_shop_url(),  $vendor->get_shop_name() ); ?>
				</span> 
				<br/>
            <?php
        }

       global $product;
        $seller = get_post_field( 'post_author', $product->get_id());
        $author  = get_user_by( 'id', $seller );
        $vendor = dokan()->vendor->get( $seller );

        $store_info = dokan_get_store_info( $author->ID );

        if ( !empty( $store_info['vendor_biography'] ) ) { ?>
            <span class="details">
                    <?php printf( $vendor->get_vendor_biography() ); ?>
                </span>
            <?php
        }
     }