Can't edit the 'Blog' page through 'WP Bakery Page Builder' or 'Elementor'

Point to note: Depending on your purchased theme, screenshots can vary.

As layout of 'Blog' (Posts page) is coming through 'Theme Options', so you won't be able to edit that page through 'WP Bakery Page Builder' or 'Elementor'. You can change the layout of 'Blog' page from 'Theme Options > Blog > Blog layout'.