What I have: Jerboa on Android, currently showing a post.
What I want: that “<” share symbol that lets me send the URL of the current post (or a specific comment) to another app on my phone (e.g. email, sms, etc) or to the clipboard.
I think that Jerboa just has not implemented this yet - right?
No, not exactly as the “share to app” function at least. But in the three dots menu under the post there’s “copy permalink”, that should do it? You just need to paste the URL manually in the target app.