Uhm.. all your articles are about screen time and not the content. The vast majority of cognitive developmental research, studies and papers by Neuroscientists, Psychologist, ECD experts and Early Age Educators, numerous of them from leading institutions including Harvard, Standford, Yale, Cambridge, UNICEF, World Economic Forum are finding either positive results or neutral results on both cognitive developmental capabilities such as working memory, pattern recognition, category formation, information processing speed along with school readiness skills in numeracy & literacy.
So, of course if you allow your child to watch mind numbing television all day, it's going to have a negative impact compared to a scientifically developed & tested application or solution.
It's practically the same as giving your toddler McDonald's everyday and then drawing the conclusion that all food has a negative impact on cognitive development.
The brain is still very much uncharted, especially early age development but Neuroscience & Technological advances over the past couple of years has made high quality applications or technological not only equal to existing methods of education but especially in the cognitive space, vastly superior.
Not to be disrespectful & I'm sure youre a great teacher but I think your googling for articles began from a very bias perspective. Ultimately google will give you the answers you want if you specifically ask for them... so not very objective