by FAKTOR VIER on WordPress.org

Fields in checkout shipping form
F4 Shipping Phone and E-Mail for WooCommerce does exactly what the name says. It adds (often needed) fields
for e-mail and/or telephone number to the shipping address. Here are a few things the plugin does:
This plugin works out-of-the-box. By default, the settings from the billing address
are used for both fields (e-mail = required and telephone = required, optional or hidden, according to the billing address settings).
You can change the settings for both fields on the Accounts & Privacy screen in your WooCommerce settings. Both fields you can hide or set to optional/required.