I used the original Wolftooth Roadlink on my 11sp gravel bike for a few years. It's easy to install, solid once installed, and simple.
I ended up passing it along to another rider for the Coppi. Neat that it works well for c&v speed drivetrains too.
As for the generic/knockoff versions, I would assume they work as long as they are the same geometry and measurements as the Roadlink. It's a simple piece of machined aluminum, not complicated, so tough to mess up copying it.