Hello,

Thank you very much for choosing our theme and for contacting us.

1. Unfortunately, it is not possible to integrate the tabs into the compare page.

2. Please deactivate all the plugins not related to the theme and switch the parent theme, check the issue, If the problem has gone, activate the plugins one by one, checking the issue to detect which one causes the problem.

3. I am afraid it is not possible to create the menu exactly as per your screen. Please check the mega menu that can be created here: https://woodmart.xtemos.com/

Best Regards