In my previous note I pointed out that the section called Child Acquisition in Wikipedia's article on English Phonology seems to be to be quite inappropriate and needs to be removed. I've been looking at the article on Language Acquisition, and found to my surprise that in this long and theory-heavy article there is nothing on phonology, which seems bizarre. Then I found that in the Talk page for that article there is a section called 'Proposed Revision to Phonology' in which there is the draft of a phonology section that has been sitting there for over two years.
At the moment, it seems that WP has almost nothing to say on the subject of the phonology of child language.