Try to collect the ESXi host vm-support bundle by Export System Logs , but wizard of data collect show "Logs for this object cannot be exported at this time. Another log export might be in progress."
Checked the vCenter certificate mode refer to https://knowledge.broadcom.com/external/article/402499/getting-logs-for-this-object-cannot-be-e.html , it is VMCA .
ESXi 8.x
The vCenter connected the ESXi host by FQDN , but vCenter server can not resolved the FQDN of ESXi host as issues happened .
To enable FQDN name resolution, verify the DNS server and add the correct entry for the ESXi host to the DNS server.
Note:
As a strictly temporary workaround, you may add the ESXi host entry to the /etc/hosts file on the vCenter Server.