I've found Make.com to be much more reliable compared to PowerAutomate, but the Survey123 Create Feature Report module still randomly errors from time-to-time. You can implement some error handling within Make to retry the report creation if it fails, but this isn't bulletproof. And this is not a Make specific problem. The issues appear to be caused by the web request sent to the Report endpoint randomly timing out, which is likely the cause for the instability on both Make and PowerAutomate platforms.
In addition to FME, you can also consider setting up a feature service webhook to trigger a notebook script (if on ArcGIS Enterprise, not AGOL) that generates the report and sends a email.