This is a small thing, but one of the first sentences in the documentation you linked is "At least I have never thought about API dependencies before building WunderGraph." It makes the problem seem small, as if you can get away with not thinking about it.
Some APIs today are literal one-liners, I wouldn't change that for another abstraction layer in between that requires me to write 1K of boilerplate.
I think it's a good idea, just work on making the user feel like it's actually easier to do the same stuff with wunder.