If you want to disable zoom, Gallery Slider & Lightbox effect on single product page in woocommerce than add this code to your theme’s functions.php file of your active child theme (or theme).
add_action( 'after_setup_theme', 'wp_remove_zoom_lightbox_theme_support', 99 );
function wp_remove_zoom_lightbox_theme_support() {
remove_theme_support( 'wc-product-gallery-zoom' );
remove_theme_support( 'wc-product-gallery-lightbox' );
remove_theme_support( 'wc-product-gallery-slider' );
}