Hello,
The shop page is the functional page and it cannot be edited. If you want to add the content to the shop page, you can do it by means of the top filter area.
The additional content will appear between the breadcrumbs area and the product grid.
1. Enable Top filters in the Theme Settings > Shop > Shop filters https://gyazo.com/3564df2a5d658a0010b6c0ebd0b537d4
2. Enable Shop filters area always opened
3. Shop filters content type should be set Custom content
4. You can choose the HTML block with the content from the Shop filters custom content drop-down. https://xtemos.com/docs/woodmart/html-blocks-2/
Best Regards