Hi,

Welcome to SeaTheme forum.

In the theme options I set this ON:
Theme Options>Blog list, enable: Show Content Built by BM Content Builder on Blog Page

This option only work for the default “posts page” ( Selected as posts page in settings>reading. ) page, it will not work for other default archive pages.
You could config the default archive page layout(sidebar, columns, etc) by the “Theme Options>Blog list”: https://doc.seatheme.net/sea/blog/blog-list-layout-style/

Because BM content builder cannot edit the default archive pages directly. There is another solution, you need to create pages by Grid module of BM content builder for each category or tag. Install a redirection plugin, redirect the archive page URL to the page created by BM content builder.

Regards!
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