tldr: chapo.chat isn't ready yet.
Don't worry, you'll get to be called libs by the users from lemmygrad.ml Soon™.
[chapo.chat is] running a heavily modified version of lemmy forked months ago, for not just the front end, but the back end as well. Once they’re up to date with the most recent lemmy versions that have federation working, then we can try federation, on the back end at least. Their back end devs are great, but their front end devs contribute nothing upstream, and will have to re-create all the federation-related parts of the lemmy-ui code for their own fork.
EDIT: See @Beatnik's comment
I came here because I was a lemmy enthusiast and wanted to generate user interaction. Why? Because I knew this day would come. Chapo will reach critical mass before federation launches. Then? They will spread out to the other lemmy sites and become the backbone of activity. The effects of this is that the early adopters will be able to stay in their place of power. This will lead to them becoming the mainstream instances that lead the first wave. How? I have analysed your brainworms. the methods of course are classified ;)
The future is now