You’re still running 2 different Collection runs though, it doesn’t matter if the Collection that you’re using is the same one.
Each time you run that command, it uses the same internal template to create the report you see in the browser. There isn’t a way to append the previous results from any older report if that was the case and you continued to add on to a single report, it would be huge and you would get to the point where you would struggle to even open the file
The only quick way that I can see that working is to combine the 2 data files so that the variable references in the CSV columns are being linked to the data points in those different folders/request and running the single Collection without the
It’s not only a limitation with my reporter, but it’s also the same with the standard HTML reporter and if you were running the Collection with a data file in the Postman app, without involving Newman.
You can only currently run 1 Collection at a time and with 1 datafile at a time.