Twitch Icon and Recent Posts

I’m new to this plugin, but is there a way to add a new Social Media icon such as Twitch? Many gaming websites rely on Twitch as a social media site. I’d like to be able to add a Twitch link for my authors. Also, is there a setting to display the author’s most recent posts? Thanks!

https://ww.wp.xz.cn/plugins/simple-author-box/