Most likely, you are using the USM plugin. They usually do show, however not on your blog page, but on your single posts pages. The Premium Plugin also allows displaying the icons on your homepage.
The premium plugin will be available soon. If you already buy the licence(s) before it launched, then:
To get the deal, please make a donation in the amount of number of licences (1 license = 1 website) you need: One license is 13.97 USD (30% off the regular price of 19.96 USD).
We’re happy for new feature requests. However, implementing new features takes time and effort, so we only take requests from existing premium plugin users, to know that you’re serious with it :)
Support is only available for premium plugin users. Therefore, please enter your…
(* You can upload multiple files. Maximum 5 files are allowed to upload with 20 MB max size of each file.)
We will get back to you shortly.