Hi there!

Thanks for your query.

If you want to use extra social icons in Helix templates, you can use Custom field for it.

You need to add the fontawesome class<space>social link Example: fa-instagram https://instagram.com

https://prnt.sc/u07EuQVbn11r

https://prnt.sc/LBqtwB_yIuZv

If you want to add more than one social icons, then you need to use any of the default icon and use custom CSS. For example, to change Dribble icon to Github, you need this CSS

 .fa-dribbble::before {
    content: "\f09b";
}

Note: Path towards custom CSS(Joomla 3): Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.

Best Regards