Ultimate Member: Change the WP_Post object (title, content, excerpt) for displaying the restricted post. Ignore or use your custom

functions.php

// It works since the 2.2.3:
// Avoid changing the post title to the "restricted content title".
add_filter( 'um_ignore_restricted_title', '__return_true' );
// Avoid changing the post content to the "restricted content content" not recommended to use or use with caution!
add_filter( 'um_ignore_restricted_content', '__return_true' );
// Avoid flushing the post excerpt when post is restricted.
add_filter( 'um_ignore_restricted_excerpt', '__return_true' );

// It works since the 2.8.2:
/**
 * Customize WP_Post object for the restricted post (if it's not hidden) in the singular post's page
 *
 * @param WP_Post $post
 * @param array $restriction_settings
 * @param WP_Post $original_post
 *
 * @return WP_Post
 */
function um_custom_data_restricted_singular_post( $post, $original_post, $query ) {
	// if you want to show the original post title instead of the restriction content title
	// use these object keys https://developer.wordpress.org/reference/functions/get_post/#comment-876
    $post->post_title = $original_post->post_title;
	// sometimes $original_post is already customized then please use this way
	$p = get_post( $original_post->ID );
	$post->post_title = $p->post_title;


    // please use this line if you need to restore the post excerpt
	$post->post_excerpt = $p->post_excerpt;
	return $post;
}
add_filter( 'um_access_restricted_post_instance', 'um_custom_data_restricted_singular_post', 10, 3 );