Does concept mapping involve implicit retrieval practice?

Naively, I would expect this activity to evoke Implicit retrieval practice, but Karpicke & Blunt - 2011 - Retrieval Practice Produces More Learning than Elaborative Studying with Concept Mapping find otherwise, and so does Kornell (2012) (as cited in Agarwal et al. - 2021 - Retrieval Practice Consistently Benefits Student Learning).