Bootstrap 4/5: Flexbox CardHeader with buttons on the right

To get a right justified button in a card header

      <h4 class="card-header d-flex justify-content-between align-items-center">
        <div>
          <i class="fas fa-user-alt"></i> Title Here
        </div>
        <button type="button" class="btn btn-sm btn-primary">Button</button>
      </h4>