hello Jorge,
This is not panic.log.CPU.caller as you suspect. I wrote an article some time ago on my blog (you can find an address in "about me" tab or in google) about the interpretation of panic.string in the iPhones and iPads.
In your case Watchdog is talking about Timeout - No Check In
The timeout process checks the overall functionality of the system. If the time between "sub-checks" exceeds the maximum value, the device will reboot to try to fix it. Easy to trace if the Springboard, Logd, Wifid or Thermalmonitord instruction does not mention the physical location of the sensor. I assume that in this case it is a software component. Especially visible in the first releases of version 16.0. Since version 16.2 I have not recorded any case (any conclusions?) ( ! for 7-12pro/Max models only ! )
Your watch.daemon noted that Wifid (wifi daemon) is having trouble noting the presence of the backboards service. Everything indicates a short circuit in the voltage divider line, the potential of the gate transistor does not match or the interposer bus has been interrupted (a crack between the layers of the sandwich).
and here's another question, are you a user - use the services of an experienced repair shop or if you repair phones professionally, you know what to do. If not, ask before do anythings.
* fingers crossing :-)