spacious-child theme
functions.php
$social = '<a href="https://facebook.com/example"><i class="fa fa-facebook-official"></i></a>';
$spacious_footer_copyright = '<span class="copyright">'.$default_footer_value.'</span>'.'<span class="social">'.$social.'</span>';
Customizer
Additional CSS
.footer-socket-wrapper .social a {
color: #666666;
max-width: 50%;
float: right;
font-size: 16px;
}