OODA is essentially just another name for the scientific method, so its not really that surprising that it shows up under different names all over everywhere.
(Note: that I'm not intending to minimize the value of OODA by pointing out that it is just another name for the scientific method -- successfully explaining the scientific method in terms that get people to understand it and apply it effectively in specific domains -- particularly ones that have strong, established cultures that resist adaptation, is a significant accomplishment.)
> It's what Scrum is all about.
Well, its what Agile (and perhaps more to the point, Lean) is all about; Scrum is a tightly defined set of processes that comes with the caveat that if you aren't doing this exact set of processes as described, you aren't doing Scrum, and as such its somewhat in tension with OODA.