JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent-element">
    <input type="button" class='btn btn-md btn-primary' value="Submit Responses" id="submitBttn" />
    <span class="green-success" id="surveySuccess">&#10004</span>
	<span class="red-danger" id="surveyFailure">&#10006</span>
</div>

CSS

.parent-element {
    display: flex;
      justify-content: center;
}