learndash_post_settings_metaboxes_init_{$this->post_type}

 <?php
/**
 * Example usage for learndash_post_settings_metaboxes_init_{$this->post_type} filter.
 */
add_filter(
	'learndash_post_settings_metaboxes_init_sfwd-topic',
	function( $post_type, $metaboxes ) {
		// May add any custom logic using $post_type, $metaboxes.

		// Always return $post_type.
		return $post_type;
	},
	10,
	2
);