I'm glad you asked this question, especially as a federated user. It draws attention for me that not all of the instances may have coding for badges, so even though I had hoped we could one day employ badges here on kbin.social, I'm realizing that we can't make that a submission rule if federated users don't even have that option.
Also, it will depend on how you're accessing the magazine (which is what all kbin instances call communities), as to whether the sidebar is viewable. I can only think of describing how to access the sidebar if you're another kbin.social user accessing from mobile.
These are realistic barriers to future plans I had wanted to roll out, so thanks for asking this question and shedding light on it for me.