//Check is_shop - Shop base page
        // if True then Show Category Header Content of The first Product in Shop base Page 
        
if (is_shop()) {
        $args = array('taxonomy' => 'product_cat');
        $product_categories = get_categories( $args  );
        $term_id = $product_categories[0]->term_id;  
        $content = get_term_meta($term_id, 'cat_meta');
        if(isset($content[0]['cat_header'])){
            echo do_shortcode($content[0]['cat_header']);
        }
}