I have been experiencing this as well on the macOS 27 Beta. My simple use-case was to try pinging a local IP in iTerm2, which resulted in sendto: No route to host, with no local network popup. The app is not listed in the local network privacy settings, and since its introduction it still has been missing the buttons to add/remove programs from the permissions list.

I can't believe that almost an entire year later this is actually still a problem.