Magento – Remove tags from shipping address fields on the checkout page in Magento 2.2.2

You could overwrite the template layout. This'll give you the most flexibility but may or may not have undesired consequences.

In the shipping-address/form.html knockout template there is this code:

<!-- ko foreach: getRegion('additional-fieldsets') -->
<!-- ko template: getTemplate() --><!-- /ko -->
<!--/ko-->

You can remove this and overwrite it with snippets as such:

<!-- ko foreach: getRegion('additional-fieldsets') -->
<div class="row">
    <div class="col-sm-6">
        <!-- ko with: getChild('firstname') -->
        <!-- ko template: {name: getTemplate(), data: $data, as: 'element'} --><!-- /ko -->
        <!-- /ko -->
    </div>
    <div class="col-sm-6">
        <!-- ko with: getChild('lastname') -->
        <!-- ko template: {name: getTemplate(), data: $data, as: 'element'} --><!-- /ko -->
        <!-- /ko -->
    </div>
</div>
<!--/ko-->

This will require to you put in logic for each field, it will also make it difficult to have dynamic fields.

I don't know exactly why this works, but it's just working for me.

If I set a sortOrder greater than 100, then these fields will be displayed after the street field:

<item name="country_id" xsi:type="array">
  <item name="sortOrder" xsi:type="string">100</item>
</item>
<item name="region_id" xsi:type="array">
  <item name="sortOrder" xsi:type="string">101</item>
</item>

If instead I give a sort order lower than 50, then fields are displayed before the street:

<item name="country_id" xsi:type="array">
  <item name="sortOrder" xsi:type="string">1</item>
</item>
<item name="region_id" xsi:type="array">
  <item name="sortOrder" xsi:type="string">2</item>
</item>

I suppose that somewhere the street's sortOrder is set to a value of 70 more or less.