There is probably nothing that is safe for a toddler to have displayed on a screen 6 inches from their face for an hour+ a day, either for their physical or mental development. Adults suffer as well, but at least by their own agency.

Also to point out, if a 10 year old walks in to the street and is hit by a car, their parent gets charged now (in some US jurisdictions.) The idea that the adult is not responsible for the child does not correspond with US law. Maybe it's different in Europe.

A secondary issue is tech companies on-boarding children to having public social media profiles (and their parents posting the child's entire lives on their own) -- which is completely asinine and appalling. That bridge was breached years ago and somehow no one complained loud enough. Certainly a mistake.