Hello,
You can configure widgets for the shop page, at the same time we cannot guarantee you can do the same for functional pages of WCFM.
For the shop page:
1. Enable Top filters in the Theme Settings >Product archives > Shop filters https://gyazo.com/3564df2a5d658a0010b6c0ebd0b537d4
2. Enable the Shop filters are always opened
3. Shop filters content type can be set to Custom content or widgets: https://xtemos.com/docs-topic/widgets-and-sidebars/
4. You can choose the HTML block with the content from the Shop Filters custom content drop-down.
You can create the banner in the HTML block by means of the builder you use on the site.
If you have any questions please feel free to contact us.
Best Regards