Hi,
Here you find all the logs and details about each one: vSphere Logs location
Regarding the question, I would check vmkernel logs, hostd, and importantly the syslog. In those, you could find information on any issues in your ESXi.
Also, I would look for any dump file that could be created while there is a PSOD and restart the ESXi host.
Check here for more information about the dump files: Dump Files
Hope this could help
Luciano Patrão
VCP-DCV, VCAP-DCV Design 2023, VCP-Cloud 2023
vExpert vSAN, NSX, Cloud Provider, Veeam Vanguard
Solutions Architect - Tech Lead for VMware / Virtual Backups
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Blog: https://www.provirtualzone.com | Twitter: @Luciano_PT