Not sure that is a problem as the logs show the database reaching a consistent state:
But the database doesn't open a port after reaching this state. Hence, when I nmap the IP address of the standby server, I don't see an open port for postgresql. Is that normal?
Also setting up logging connects/disconnects on the primary to see if an attempt is even being made.
How would I set this up? I think I'm already seeing failed connection attempts since they raise FATAL errors, but maybe I'm not seeing successful connection attempts.