Cant find out how to set social icons in single post

Hi,

I have like a week installed wp theme Ocius, and cant find out how to set the social icons for each single post view, they are also under each post as well as on main page in post view frame, but there is no any way how to change links for fb, twitter etc. or set it up.

Upper menu I figured out but not this at all, and if I click on Appearance > Customize it redirects me from wp setting page to my web with theme widget settings. So I dont have at all the rest of > Single Post Options > Related Post Options way, as says wp theme support wiki here: https://docs.candidthemes.com/ocius/#SinglePostOptions
So can you help me how I change it and set my own links for social icons in single posts?

Thank you a lot or all this will need to be replaces by some plugin then, cuz this is not usable

The page I need help with: [log in to see the link]