Enable to use all widget areas

Hi, when I install Ildy theme i saw this theme has several widget areas but when i try to customize theme, i only show me few widget areas. How to enable all widget areas.
This text I get :
Your theme has 8 other widget areas, but this particular page doesn’t display them.
You can navigate to other pages on your site while using the Customizer to view and edit the widgets displayed on those pages.

Hello there,

I hope you are doing well today.

All the widget areas are unlocked by default.
In order to use the widget areas, simply go to Appearance > Widgets and add a widget to the desired widget area.

Best Regards,