The original order of the My Account menu items can be seen in /wp-content/ plugins/woocommerce/includes/wc-account-functions.php
[ woocommerce_my_account] – shows the user account page
custom content for a custom account menu item in Woocommerce 3.
For example: You may have a 'my account' page shown at URL yoursite.com/my- account.
Change the entry title of the endpoints that appear in My Account Page ...
Enter a title and content for your new account page. The content of this page can include anything you'd add to a regular WordPress page.
Change the order of the endpoints that appear in My Account Page
Add multiple endpoints (tabs/menu items) to my account page.
$menu_links['payment-methods'] ); // Remove Payment Methods //unset( $menu_links['orders'] ); // Remove Orders
Revamp My Account Page Endpoints And Design