FormData.entries()未捕获单选框字段的问题求助

各位好，我在做表单验证的时候，通过遍历FormData.entries()来处理字段，但发现其中的单选框字段没有被捕获到，实在搞不明白哪里出问题了，来求助大家！

我是这么初始化循环的，还加了日志输出：

for (let [fieldName, val] of formData.entries()) {
  console.log(fieldName);
}

控制台输出的字段如下：

name
email
property
deliveryAddr
startDate
duration
other

我原本预期deliveryCity会紧跟在deliveryAddr后面出现，但实际完全没看到。下面是包含这两个字段的HTML代码块（用到了Bulma的样式类）：

我一开始以为是单选框没加value属性，加上之后还是没解决问题，deliveryCity依然没出现在FormData.entries()里。麻烦大家帮忙看看，谢谢啦！

<div class="mt-2 is-hidden abc-contact-form-delivery-required-fields">
  <div class="field">
    <label class="label is-size-4">
      <span class="mr-1 has-text-primary-dark">Delivery Street Address</span>
      <span class="has-text-danger">*</span>
    </label>
    <div class="control has-icons-left has-icons-right abc-featured-property-label">
      <input class="input" type="text" class="abc-contact-form-field-delivery-addr" name="deliveryAddr" placeholder="Your Beach Home Address">
      <span class="icon is-small is-left">
        <i class="fas fa-road"></i>
      </span>
    </div>
  </div>
  <div>
    <label class="label is-size-4">
      <span class="mr-1 has-text-primary-dark">Delivery City</span>
      <span class="has-text-danger">*</span>
    </label>
    <div class="mb-3 abc-featured-property-label">Sorry we do not deliver to Fort Morgan</div>
    <div class="field abc-featured-property-label">
      <div class="control">
        <label class="radio is-size-5">
          <input type="radio" name="delivery-city" value="Orange Beach" class="abc-contact-form-field-delivery-city">
          Orange Beach
        </label>
        <label class="radio is-size-5">
          <input type="radio" name="delivery-city" value="Gulf Shores" class="abc-contact-form-field-delivery-city">
          Gulf Shores
        </label>
      </div>
    </div>
  </div>
</div>

备注：内容来源于stack exchange，提问作者Dexygen