I earlier mentioned how Mike Wheeler embraces what I would call a "mark of the cognitive approach" to adjudicated matters regarding extended cognition.
But, Mark Rowlands has also embraced a lot of the approach as well.
Gotta like it. There are at least some points where the advocates and critics of EC are not talking past each other.
Rowlands, M. (2009). Extended cognition and the mark of the cognitive. Philosophical Psychology, 22(1), 1-19