We have created a quick code snippet that you can use to make phone numbers not a required field in WooCommerce.
add_filter( 'woocommerce_billing_fields', 'wps_remove_filter_phone', 10, 1 ); function wps_remove_filter_phone( $address_fields ) { $address_fields['billing_phone']['required'] = false; return $address_fields; }
You can use code snippet plugin to use the above code.