I may read the OP after responding to the Que in title, but I may not.
Yes, randomness exists all over the place. There is a machine manufactured to mimic the same. True story.
Much more common is corruption but randomness does in fact exist.
As an example, my computer (telephone) is manufactured and the systems within should ALWAYS begin a sentence with a capital letter. Around half the time it DOES NOT. This is just one example of many. The computer has been corrupted, I assure you; this is not random.
i think this belongs here
https://catholicscientists.org/videos/randomness-in-quantum-phenomena-2/