Hello Rahul Banga,
Thank you for contacting us and for using XStore.
Please delete the next custom CSS code from Theme Options > Theme Custom CSS: https://prnt.sc/17fOwhSKdGnA and check the menu after that.
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