Add to Social Share List in Blog Settings - Helix Ultimate

Hello,

I have seen examples of the Blog setting showing the Google+ Icon and I am assuming capable of other platforms such as Instagram.

However I cannot locate any reference on how to add additional social links other than the 3 default.
Can you pelase guide how this can be achieved?

I am in the Helix Template settings and BLOG tab > Social Share List.
For me no other social options work? But I want to add Google+ and possibly Instagram.

I have seen this article below, but only the 3 default FB, Twitter and LinkedIn?

This is the social share setting that sits either at the top or bottom of the article/blog.

https://www.joomshaper.com/documentation/helix-framework/helixultimate/blog-settings#documentation-heading-5

Thanks
Britt