If you’re registered at those other instances, you can create another profile(s) in Jerboa that connects to them, and then using that profile, browse by Local, I suppose.
I’m registered at both lemmy.cafe and lemmy.ca, and have profiles for both registrations in Jerboa.
Otherwise, if you’re registered only with Beehaw, I believe the answer is, “no, not in Jerboa, just with your device’s normal web browser.”
I am registered with both, but that kind of defeats the point of being federated, right? Certainly, it works for now as a stop-gap solution. (I do of course appreciate how early in development everything is). It would be interesting to know if there is appetite for that as a feature.
I wish any of the apps would implement this, if they can display a “default” page for logged out users, then it certainly has to be possible.