Hello,
The process ntoskrnl.exe may contain multiple threads. Use the Process Explorer tool to view which threads are included and which stacks each thread contains:
https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer
In addition, use the Windows Performance Analyzer tool to analyze the reasons for the forced restart of ntoskrnl.exe:
https://learn.microsoft.com/en-us/windows-hardware/test/wpt/windows-performance-analyzer
For the dump files, it is better to open start and search for feedback and open the Feedback Hub app and file a bug report and attach dump files there: