Sorry to hear about the inconvenience. Kindly, please share your Site WP-ADMIN Login details in the Private Content field so that we can check this concern on your Site and help you out accordingly.
Please deactivate all the 3rd party plugins and activate only theme-required plugins on the site, and then check the issue. I am sure your issue will be solved. Then activate the 3rd party plugins one by one and check which plugin is creating the issue for you.
Otherwise, if the issue still exists, then keep the 3rd party plugins deactivated and let me know I will check and give you a possible solution.
I ahve deactivated the all 3rd plugin plugins.
I ahve only google site kit plugin is activated nad rank math SEO plugin is activated.
When i click on menu button on home page it will change the website url to https://buyshuy.com/#.
And i am sure that this issue is occuring due to some JS error.
I request you to kindly check it on priority basis.