When I am trying to get any new device working and have no idea what the IP settings of the device is, I use both Wireshark and tftpd64 from
Tftpd32: an opensource free firewall friendly dhcp, syslog sntp and tftp server/service for windows, tftp client Connect the camera or whatever, while it is powered off, directly to your laptop network port. Run wireshark and make a filter to not capture any of your network cards traffic so you will only see traffic from the camera. Run tftpd64 and turn on the DHCP server in that and watch the log. Power on the camera and wireguard will capture anything that the camera spits out, if you are lucky and it is looking for a DHCP address, the tftpd log will also show that. You will probably be surprised how much traffic a camera generates when it boots up and what it is looking for.