Those aren't bad numbers for a fairly new engine.
How did you sample the oil? mid stream on the drain?
Which oil are you running?They don't have the type of oil you run on the report, just the weight, which will hinder the ability to give accurate results as well. You might not have known on this report, but for future reference.
While it wasn't likely needed, or shouldn't be, at 2500 miles TBN is not listed on that report. TBN would have really told you if they changed it or not, no way to really know without it. Blackstone charges extra for that, which is absurd IMO. I also haven't ever gotten the warm fuzzy from their techs when you call them... they don't seem to know engine oil vs cooking oil over the phone.
I would look at OAI testing. They are who my local Cummins uses, and they include TBN on their standard kit. Special kit pricing is available thru Amsoil since that's the oil you use.
I bought my 18 used as well, with 3200 miles on it. Dealer said they changed the oil but they didn't. I dumped the factory fill at ~4500 miles and then changed it again around 11K. I now have Amsoil DME in it and will sample it for the first time at the next change.