The user in this screenshot is just an example. I’d love to be able to receive updates when my favourite users post. Also, this has been a great app to use, and I’m looking forward to future development!
That’s not a feature of even Lemmy itself, so how do you expect Jerboa to pull it off?
From a technical standpoint, I’m pretty confident that it could be done client-side via polling the list of followed users. Lemmy does expose their comments.