Hello, Majkvvv,
Thank you for contacting us and for using XStore.
Grouped products functionality comes from WooCommerce plugin, we do not have additional settings from our theme side. Please contact WC support – https://wordpress.org/support/plugin/woocommerce/
If you have any additional questions or concerns, please do not hesitate to reach out to us. Our support team is always available to assist you.
Kind Regards, 8theme team
