This kind of study on screen watching shows up the treacherous nature of trying to tease out cause from effect: Does media watching inhibit the development of executive functioning — or does a lifestyle of diminished executive functioning lead to greater media watching: Who’s the chicken, who the egg?
“Your child’s academic success may start with their screen time as infants, study says”
https://www.cnn.com/2023/01/30/health/screen-time-infants-executive-function-wellness/index.html