My account page contains default WC registration form. Settings you can find in WooCommerce > Settings > Accounts & Privacy or refer to WC documentation.
Register page shows our registration form – http://www.8theme.com/demo/docs/royal/#4_registration_page It can be changed via additional customization in files. Copy et_register_form function (wp-content/themes/royal/framework/theme-functions.php – section “! Registration Form”) into functions.php of child theme and make changes there.