User fHc7JH4yj79efrQ839rnlX80HJqw2JaqUI8k71bj is a CloudSOC system account that makes reporting calls.
An enhancement has been requested to give a better description of the event such as "System Report". It is not a user that can be impersonated and it does not produce a security risk.
The impersonate user verbiage records the CloudSOC sysadmin that configured the report or compiled the data.