wp-floating-action.php

<?php
/**
 * Plugin Name: Floating Action
 * Plugin URI: https://gist.github.com/Fray117/dfc03c515f235bd096cf8e52872789c5
 * 
 * Description: Display a customizable floating widget
 * Version: 0.6
 * Author: SABAKO
 * Author URI: https://sabako.id
 * 
 */

function floating_action_html() {
	$link = 'https://linktr.ee/jasperskin';
	$css = '
		position: fixed;
		bottom: 32px;
		right: 32px;
		background-color: #fff;
		border-radius: 32px;
		width: 64px;
		height: 64px;
		display: flex;
		justify-content: center;
		align-items: center;
		font-size: 32px;
	';
    $html = '<div class="display-floating-btn" style="' . $css . '">
		<a href="' . $link . '" style="margin: auto;">
			<i class="fas fa-comment"></i>
		</a>
	</div>';
    echo $html;
}

add_action( 'wp_footer', 'floating_action_html' );