Stepping back a bit, as this might help with deciding content, who is this training for? And what role are they looking to be hired into? And at what sort of companies?
My impression of various certifications is that they're tied to very specific tech in a very specific area (thinking of all the various networking ones here). Ie. After getting this certification you are guaranteed to know the various ways you can configure this family of Cisco switches, etc. What would be the equivalent here?
In my experience, with chaos engineering, most people involved in this at the larger tech companies have broader software or sre backgrounds. At least at the companies I've worked at, my guess would be that having large scale systems experience would trump a certification like this.
So I guess the question for me, before investing a ton of time here, is what's the value add? Why a certification instead of an online resource? If people pay money to be certified, is there a ROI for them? What are the skills that potential employers know people certified as such have (especially if platform agnostic)?