From the linked press release (https://www.sgpc.gov.sg/detail?url=/media_releases/astar/pre...)

> Among children whose parents read to them frequently at age three, the link between infant screen time and altered brain development was significantly weakened.

It sounds a bit like the problem might not be so much "heavy screen time" as "heavy screen time, plus no alternative stimulation". Not defending heavy screen time at all, just thought it was an interesting tidbit.