You can use the following PHP snippet to hide the Course Grid settings meta box on specific post types. This will remove all of the Course Grid options from the edit pages on the post types that you don’t want it on.
By default, the Course Grid settings are displayed on all post types, but most people just need them on courses, and maybe lessons or topics. But that’s it.
add_filter('learndash_course_grid_excluded_post_types', function() {
return [
'sfwd-transactions',
'sfwd-essays',
'sfwd-assignment',
'sfwd-certificates',
'attachment',
'posts',
'page'
];
}, 99);The code above will remove the grid settings meta box from LearnDash transactions, essays, assignments, and certificates, as well as WordPress attachments, posts, and pages.
You can add custom post types to the list, separated by commas, to exclude the grid settings from additional post types.