LifterLMS Private Areas filter examples: https://lifterlms.com/docs/private-areas-filters/

llms_pa_comments_per_page.php

<?php // don't copy this to your functions.php file
/**
 * Customize the number of comments displayed on each page of a Private Area Post
 * @param    int     $number  default # of comments (50)
 * @return   int
 */
function my_llms_pa_comments_per_page( $number ) {
	return 100;
}
add_filter( 'llms_pa_comments_per_page', 'my_llms_pa_comments_per_page', 10, 1 );

llms_pa_html_discussion-alt.php

<?php // don't copy this to your functions.php file
/**
 * customize PA commenting to Allow HTML quicktags for admins only
 * @param    boolean   $bool  default HTML status (true)
 * @return   boolean
 */
function my_llms_pa_html_discussion( $bool ) {
	if ( ! is_admin() ) {
		return false;
	}
	return $bool;
}
add_filter( 'llms_pa_html_discussion', 'my_llms_pa_html_discussion' );

llms_pa_html_discussion.php

<?php // don't copy this to your functions.php file

/**
 * Disable HTML quick tags for discussion (comments) on PA Posts
 */
add_filter( 'llms_pa_html_discussion', '__return_false' );

llms_pa_post_clone_status.php

<?php // don't copy this to your functions.php file
/**
 * Customize the default status of a Private Area post when duplicating a PA post
 * NOTE: if you set to publish, notifications will be sent IMMEDIATELY possilby resulting in a student getting a duplicate notification!
 * @param    string     $status  default status (draft)
 * @return   string
 */
function my_llms_pa_post_clone_status( $status ) {
	return 'publish;' // set this to be any valid WP Post Status
}
add_filter( 'llms_pa_post_clone_status', 'my_llms_pa_post_clone_status', 10, 1 );

llms_pa_post_excerpt_length.php

<?php // don't copy this to your functions.php file

/**
 * Customize the length (in words) of Private Area post excerps
 * @param    int     $length  default word count (55)
 * @return   int
 */
function my_llms_pa_post_excerpt_length( $length ) {
	return 85;
}
add_filter( 'llms_pa_post_excerpt_length', 'my_llms_pa_post_excerpt_length', 10, 1 );

llms_pa_post_roles_can_discuss.php

<?php // don't copy this to your functions.php file
/**
 * Allow additional roles to discuss a PA post from the admin panel
 * @param    array     $roles  array of WP_Role names
 * @return   array
 */
function my_llms_pa_post_roles_can_discuss( $roles ) {
	$roles[] = 'editor';
	return $roles;
}
add_filter( 'llms_pa_post_roles_can_discuss', 'my_llms_pa_post_roles_can_discuss', 10, 1 );

llms_pa_post_show_time.php

<?php // don't copy this to your functions.php file
/**
 * Do not show the posted time for PA posts
 */
add_filter( 'llms_pa_post_show_time', '__return_false' );