Use a filter to adjust the content of the user page that is created with PMPro and the User Pages addon.

pmpro-user-page-content-filter.php

<?php   // do not copy this line.
/**
 * When the user page is created, add some content. Add default content by Level.
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function my_pmpro_user_page_purchase_postdata_content($postdata, $user, $level)
{
	if($level->ID == '1'){
	//update post content
	$postdata['post_content'] = "<p>Thank you for using our site.</p>
			<p>This is for level 1.</p>
			<p>We got links:</p>
			<ul style='margin-bottom: 3em;'>
			<li><a href='" . home_url() . "'>Homepage</a></li>
			<li><a href='" . home_url("/members/") . "'>Members Area</a></li>
			<li><a href='" . home_url("/contact/") . "'>Contact Us</a></li>
			</ul>";
	return $postdata;
	}
	if($level->ID == '2'){
	//update post content
	$postdata['post_content'] = "<p>This is for level 2</p>
			<p>This is some extra content for the user page.</p>
			<p>We got links:</p>
			<ul style='margin-bottom: 3em;'>
			<li><a href='" . home_url() . "'>Homepage</a></li>
			<li><a href='" . home_url("/members/") . "'>Members Area</a></li>
			<li><a href='" . home_url("/contact/") . "'>Contact Us</a></li>
			</ul>";
	return $postdata;
	}
	else{
	//update post content
	$postdata['post_content'] = "<p>This is for Default Content no level</p>
			<p>This is some extra content for the user page.</p>
			<p>We got links:</p>
			<ul style='margin-bottom: 3em;'>
			<li><a href='" . home_url() . "'>Homepage</a></li>
			<li><a href='" . home_url("/members/") . "'>Members Area</a></li>
			<li><a href='" . home_url("/contact/") . "'>Contact Us</a></li>
			</ul>";
	return $postdata;
	}
}
add_filter("pmpro_user_page_purchase_postdata", "my_pmpro_user_page_purchase_postdata_content", 10, 3);