I'd like to see more instructions on how to configure computers for Flow, and maybe make it possible to define IP address and port for another computer manually.

I use a Logitech mouse (MX Master 3) and keyboard (MX Keys) for my two work computers that have firewalls and antivirus software installed (they are administered by our IT department, I can't remove/shut down or configure them), and I can't get Flow to work.
If I knew exactly what configuration is needed I can ask the IT people to configure it for me.