add-custom-endpoint-to-wc-account-page.php

<?php
/**
 * Add custom endpoint to the My Account menu
 *
 * @param array $items
 *
 * @return array
 */
function ywp_account_menu_custom_item( $items ) {
	$logout 					= $items['customer-logout'];
  
	unset( $items['customer-logout'] );
  
	$items['my-navigtion-item']	   		= 'عنوان منو';
	$items['customer-logout'] = $logout;

	return $items;
}

add_filter( 'woocommerce_account_menu_items', 'ywp_account_menu_custom_item', 10, 1 );

/**
 * Custom endpoint content
 */
function ywp_account_custom_item_callback() {
	?>
    <h1>Page Title</h1>
    <p>Blah blah blah</p>
    <?php
}

add_action( 'woocommerce_account_favorites_endpoint', 'ywp_account_custom_item_callback' );

/**
 *
 * Note: The code performs heavy operations and using it in its current form does not work well.
 * This code should only be executed once.
 *
 */

/**
 * Adding an endpoint creates extra rewrite rules
 */
function ywp_flush_rewrite_rules() {
	add_rewrite_endpoint( 'my_custom_url', EP_PAGES );
	flush_rewrite_rules();
}

add_action( 'init', 'ywp_flush_rewrite_rules' );