When I open my website’s homepage on a search engine using a mobile device, it appears broken.
The menu button isn’t working, and the logo and images on my product pages are out of scale. When I open my website on a laptop, it works perfectly fine. However, when I open it on a mobile phone, the homepage is completely broken. I have deactivated all the plugins, but there is still no change.
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 share the WP admin login details of your site so I will check and give you a possible solution.