I realized that, and connected the pi5 to the lan port on my wifi router but wasn't able to see it in the clients list on my router dashboard (192.168.1.1). Waited for 10-15 mins.
I can't see my rpi5 installed with armbian cli on nmap / angry ip scanner, when I connect it via ethernet to my laptop.
The getting started guide mentions it via serial or hdmi, do I need to enable ethernet somewhere??