The article title claims causality. The article body says the researchers didn't claim causality:
The review, conducted by researchers from four UK universities known as the Action on Digital Device Immersive Conditions Team, did not establish causal links between screen use and specific developmental conditions.> The article title claims causality.
Maybe they edited the title since you saw it, but currently there's no claims of causation unless you think "can" and "will" are synonyms.
I don't like the screen time generalization either. What about watching a tv show with a parent explaining? What about trying a videogame with a controller on an actual game console, experiencing remote controlling something in a screen (Spoiler alert: amazing results, I have a video with my daughter shocked at age 2).
Smartphones used as a babysitter with a f2p game is probably garbage time
This happens a lot in mainstream science and journalism. Another famous example is the often misquoted study (from McKinsey?) about DEI improving company results. The authors didn’t claim causality, since the most likely explanation is just that already large companies were more likely to adopt policies that discriminate based on race or gender, simply to keep up with trends. But virtually all news articles and company policies mistakenly referenced the study as if it had established causality.
The ADDICT, nice
That's a problem because "using a screen as a babysitter" likely correlates with overworked poorer parents and thus a whole host of other developmental problems