How to spot the cause of a Kernel Panic in the problem report?

This is a cascading failure. The ReportCrash process is listed as the problem, and it is highly likely a different process started the issue but the backtrace is corrupted.

This would likely need someone with full access to the system to step through the log as detailed in this KB:

• https://developer.apple.com/library/content/technotes/tn2063/_index.html

Without seeing a few of your crashes (assuming you have several), I would reason that the unload is irrelevant since your system was up 38 minutes and the kext unload happened at 1 minute 32 seconds after boot - so the system ran for 36 minutes after the kernel extension was unloaded.

Since this is a page fault crash, report crash was reading data from a null pointer and this will be hard to diagnose after the fact since the real culprit wasn't located by the log file dump of the panic. You'd need to disassemble the libraries or have a second Mac to symbolicate the kernel and many of the objects to know what happened. Unless you have this exact panic about 5 more times and/or can make it happen at will - digging deeper is going to be very costly and time consuming and exceptionally low chance of success.