You can use User Role Editor plugin and edit or add new user rule. User Role Editor WordPress plugin allows you to change user roles and capabilities easy. Just turn on check boxes of capabilities you wish to add to the selected role and click “Update” button to save your changes.
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Install the Classic Editor plugin: https://en-au.wordpress.org/plugins/classic-editor/
There are lots of ways to get all IDs. Assuming you do want all posts – which include Posts, Pages, Media, Menu Items, custom post types, etc.: phpMyAdmin: Run a SQL query: SELECT ID FROM wp_posts then export the results to whatever file type you prefer.