Hello, @Maheeb Sons,
1- Simply go to the Dashboard >> XStore >> Theme Options >> Typography from there you will be able to change bold font and color see image: https://postimg.cc/TyHwH7ZB
2- You can use the header builder option for this to create multiple headers for different pages kindly watch this video for a better reference: https://www.youtube.com/watch?v=BpeXfzNwkOc&ab_channel=8THEME
3- Issue resolved now kindly check back to your site after clearing the browser cache. See image: https://postimg.cc/MvVnpJLD
4- Don’t understand your issue can you please make a video of it and share it with us so that I will understand your issue and provide you with a proper solution?
5- I created a new menu on your site named “Support Testing” then I try to add the items in the menu and I checked it by dragging the menu items it is working fine I have made a video for you please watch it complete: https://streamable.com/38po2h
6- Don’t understand your issue can you please make a video of it and share it with us so that I will understand your issue and provide you with a proper solution?
7- To add more tabs you can use this plugin “Custom Product Tabs for WooCommerce” Also, please read this article for a better reference: https://xstore.helpscoutdocs.com/article/106-support-of-the-custom-product-tabs-for-woocommerce-yikes-inc
Note: You may use the loom.com screen recording tool that records your screen and upload it on their website. You may share the URL here.
Regards 8Themes Team.