Pojo Sidebars generates as many sidebars as you need. It then allows you to place them on any Post, Page or Custom Posts Type in your WordPress site.
The Widget Area Block allows for multiple custom Widget Areas to be created on any page or post using the Gutenberg block editor.
Add sidebars to WordPress posts and pages using shortcodes with a sidebar Name or ID.
Add the widget area of 6 locations around the post article, etc..