Social buttons

Hi there,

I have found the old resolved query: https://wordpress.org/support/topic/social-network-icons-missing-from-top

As I have a similar issue, when scrolling down the social buttons appear, but at the top they can’t be seen.

However, it appears as if the theme’s code has since changed. I believe it is located in function.php now is that correct? If so, which part of the code do I replace?

Thanks very much!