I have a RPI Zero WH. It's headless. I have SSH and WPA-CONF files.
I recently did a showdown -P to turn the pi off. I moved the pi to a different part of the house. When it powered up, it was unreachable via SSH. The router failed to show that the pi in the dhcp client list. This has happened before, but not every time. I unplugged the running pi and plugged it back in. This time, the pi showed up on the lan with the same IP it had before.
Are there any logs on the Pi that I can look at to see what kinds of failures the pi was getting when it was powering up and trying to join the lan?