Honestly, I am not sure what you are looking for, but if you are talking about Orion Diagnostic logs its just a bundle that package all logs from SolarWinds Orion Platform into a zip file. These logs can be read by any text editor just like a normal file. If its something else that you are referring to on this post then please ignore my response.
Below links will help you with 2 different approaches to pull the Diag but this doesnt help your query though.
https://support.solarwinds.com/SuccessCenter/s/article/How-to-gather-and-send-a-diagnostics-file-to-SolarWinds-Support?language=en_US
https://thwack.solarwinds.com/resources/thwack-tech-tips/b/ttt-videos/posts/how-to-run-active-diagnostics-and-save-for-historical-reference-in-the-orion-platform
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I dont think their internal tooling are public. But I would just grep on 'ERROR' (case sensitive) and it will get you fairly close. Active diagnostics is also a good place to spot check for issues. I would also look into orion insights if you have not tried it before.
I use: Tracelog - Windows drivers | Microsoft Learn
Are you referring to Orion Insights? I think it is available via the Customer Page Portal. You need to submit the Diagnostics. Technical Support >> Orion Insights Environment Reviews
