Can't reach network on first boot

[llamafilm]

I've just bought a NEO3 and booted it with an SD card flashed from rk3328-sd-friendlywrt-22.03-20230109. It gets an IP address via DHCP and it responds to ICMP but I cannot access by SSH nor HTTP. Nmap does not find any open ports. I've waited several minutes for it to finish initializing and rebooted a couple times. This is the first time I've used this device and I don't have a serial cable. Am I correct that this is supposed to listen on ports 22 and 80 by default?

[PeterNielsen]

Yes, the device should accept SSH connections on port 22 by default after flashing FriendlyWRT. If not, you’re probably facing either firewall, boot issues, or network misconfiguration.