Though I couldn't get much from the pictures. This is what i think is happening.
The Alarm picture shows the alarm is for vcenter object and not for ESXi. You should check the cert expiry detail in vcenter by navigating to administration -> certificate
Next picture shows cert validity for ESXi namely for -esxi02.corp.. and esxi01.corp and issued by the vcenter. There is no problem with your esx certs.
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