Qualys Virtual Scanner Appliance is listed in the Management > Hosts page in the UI
Aria operations for Logs 8.12.x and later
Vulnerability scanners will check syslog activity and as result it will appear in hosts page.
To confirm behavior run the below commands on any VM you will see that this VM details will show in the host section :
curl -vk <ariaoperationsforlogsip>:514
curl -vk <ariaoperationsforlogsip>:514/x5RsL45