WP: Add pagination to pages (though definitely not recommended).

functions.php

<?php

// Add URL rewrite to recognize the pagination.
add_action( 'init', function () {
	add_rewrite_rule( '(.?.+?)/page/?([0-9]{1,})/?$', 'index.php?pagename=$matches[1]&paged=$matches[2]', 'top' );
} );

page-agenda.php

<?php
/**
 * Agenda
 *
 * This file adds the agenda template to the the theme.
 *
 * Template Name: Agenda
 */

namespace WPS\WP\Templates;

add_action( 'genesis_meta', __NAMESPACE__ . '\page_setup' );
/**
 * Remove the default loop.
 */
function page_setup() {
  
	remove_action( 'genesis_loop', 'genesis_do_loop' );
	add_action( 'genesis_loop', __NAMESPACE__ . '\do_loop' );
  
}

/**
 * The custom loop
 */
function do_loop() {
  
  // Get the pagination.
	$paged = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;
	$args = array(
		'post_type'   => 'agenda',
		'post_status' => 'publish',
		'paged'       => intval( $paged ),
	);
  
  // Do our custom loop genesis style.
	genesis_custom_loop( wp_parse_args(
		genesis_get_custom_field( 'query_args' ),
		$args
	);
                      
}
                      
// Let's go!
genesis();