I don't know the answer to your question, but whether this is a solution depends on your focus: if you want young people to be able to read properly (locate and ingest information quickly) then audio books are not going to solve that. If the focus is reading enjoyment then sure. Could also watch a video and be perfectly entertained

No, it isn't a solution, but at least young people would be ingesting literature, which I would argue is a far cry better than the brainrot YouTube videos targeting kids. That's an assessment of the status quo though, we should absolutely encourage more physical reading as an essential skill.