Hi @PowerUser 365 ,
It's possible that the two sub-site home pages are not being properly crawled by the search service, which could be causing the zero results in the usage report. One thing to check is if the pages have been excluded from search results. You can also try re-indexing the sub-sites to see if that resolves the issue. Another possibility is that there may be a delay in the usage data processing timer job for those specific pages. If these are normal.
Also please try to do a troubleshooting, check if the instantiation usage receiver is missing, you can run the following PowerShell to get information about the event receiver:
$aud = Get-SPUsageDefinition | where {$_.Name -like "Analytics*"}
$aud | fl
$prud = Get-SPUsageDefinition | where {$_.Name -like "Page Requests"}
$prud | fl
Please check the , if both are , it means that the event receivers are disabled. We have to enable the Enable the both Event Receivers, and attache it to Usgae service application in the Content Farm. Please follow the steps in the following document: EnableReceiversfalse
https://social.technet.microsoft.com/wiki/contents/articles/51478.sharepoint-2016-popularity-trends-and-usage-data-return-no-results.aspx (Note: Please note the last sentence in the document , it needs to wait 24 hours.)
Hope it can help you. Thanks for your understanding.
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