Hello, @Zaid ALi,
The width of mobile menu is set to fine as you can see in the image of your site: https://postimg.cc/8JNK4S3z and regarding to the single product page layout I have set the layout to full from the XSTORE >> Theme Options >> WooCommerce >> Single Product Builder >> Layout check the image: https://postimg.cc/yWrjgcVd and here is the resulting image of it: https://postimg.cc/BP8xc7qv
Please check back to your site after clearing the browser cache.
Regards 8Themes Team.