Select registered sidebars and put it in any place. Better to use with Grid block to make sidebar.

Use Blocks as Widgets

With Ghost Kit you can use any blocks in available widgetized areas. How to use your blocks as widgets:

1. Create a block in Gutenberg editor (on a page or post)

2. Add your block to Reusable Blocks:

3. Open Appearance > Widgets

4. Add Reusable Block widget to your widgetized area and select your newly created reusable block:

Edit Reusable Blocks

You can edit already created reusable blocks on this page: