You can send a virgin sample of fluid to any of the analysis companies and they'll tell you what the "ingredients" are and how much of each there is. Using DW-1 as an example, it has (2) ingredients in very unusual amounts compared to any other ATF on the market. Chemist types can tell you why they use those but companies like Valvoline, Castrol, etc have chosen not to copy it at all. They must also have chemists or engineers who have determined it's not absolutely necessary.
When a fluid producer makes an OEM fluid (private-labeling), it's 99.999% certain their contract will say they can't copy it or disclose it to anyone. Even if, for example, Valvoline reverse-engineered a specific fluid, they may decide that that specific market for that one fluid isn't one they're interested in. They prefer to stick with the bigger market/application that their multi-vehicle ATF covers. It's all about $$$ in the end.
