As of 2019 we no longer recommend or support the use of blog pages.
Our customers have been asking to have more control over how the archives are displayed, and we've been listening! With the release of version 2.1.0 of Brunch Pro you now have the option to show a blog feed or to include the archive styling on your blog page.
To enable or disable the grid archive for the blog page navigate to Admin -> Pages -> All Pages -> Blog (or whatever title you've given to the page assigned the blog page template) and look for the 'Enable Archive Grid' option at the top right of the screen. If you check the box next to this option your blog page will take on the same styling as your Content Archives, if the box is left unchecked you'll see a running feed of your posts.
Note: this feature was designed for the classic editor, not the block editor.
Make sure you've set this page to use the "Blog" template found in the "Page Attributes" settings - just below the "Enable Archive Grid".