pseudo-element acting like a grid item in CSS grid

Pseudo-elements are considered child elements in a grid container (just like in a flex container). Therefore, they take on the characteristics of grid items.

You can always remove grid items from the document flow with absolute positioning. Then use CSS offset properties (left, right, top, bottom) to move them around.

Here’s a basic example:

html {
  width: 75%;
}

ul {
  list-style: none;
}

input {
  width: 100%
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
}

li {
  position: relative;
}

li.required::after {
  content: '*';
  font-size: 15px;
  color: red;
  position: absolute;
  right: -15px;
  top: -15px;
}
<ul>
  <li class="required">
    <input type="text">
  </li>
  <li class="grid required">
    <p>one</p>
    <p>two</p>
    <p>three</p>
  </li>
  <li class="required">
    <input type="text">
  </li>
</ul>

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