If you're interested in a little more die-rolling data that has been collected and collated as a way of showing pattern analysis, there have been a number of threads on the matter, if you poke around.
I've written up a couple of reports in various of those, but for the life of me I can't locate the threads now - they got buried deeply after the discussions ran their course.
However, I can share with you the results of the largest test I performed just prior to the last patch, before 'Loaded Dice' were implemented. These results are an attempt to expose more of the raw RNG algorithm that the Larian game engine is using, and compare it to other games that also base their mechanics on a random d20 die roll system. Important in this was preserving the order in which the rolls were gathered and gathering them in single long contiguous strings without interruption.
https://docs.google.com/spreadsheets/d/1tdyBoQNS_vwEGZGBgFRQex7b-Ma8S6P7zvEMK5wh9n4/edit?usp=sharing
