My daughter started commenting on people's appearance around age 5+ because she learned it from Peppa Pig. Everyone always talks down to and about the Daddy pig constantly. They try to incorporate some 'good' behaviors in the story but certain 'it's just a joke' jokes end up leaving more impressions on the kid than the shoehorned moral of the story.
It took us a while to teach her how it can hurt others if you comment on things (even if they are technically factual statements).
On the other hand, she learned some simple but useful things from Bluey that we weren't successful in teaching effectively. e.g. She learned to speak up and tell when Dad(me) was overdoing 'fun' things (literally an episode with exact same concept where Bingo has to tell her dad the same thing). She learned to be compliment and acknowledge many things verbally (instead of saying 'why do I need to say it, they know it already').
It's just not as wholesome and Peppa is kind of a brat. And the whole picking on the dad thing kind of got old after a while. It just doesn't really offer any thing of any value to my child.
Non-parents don't realize just how exactly toddlers and young children will mimic what they see; they don't see Bluey and decide to play 'keepy uppy' they see Bluey and decide to act out the entire episode, word for word, scene for scene.
And then you realize why Peppa being a bit of a brat sometimes can be an issue.
If onscreen, Peppa annoys me immediately and constantly. Just the plain tone of voice or something. A single word irritates me, let alone being such a willfully unhelpful, ungrateful brat.
I flatly refuse Peppa pig in my house. Not on TV, not on streaming, not on anything.
That little pig is only good for cartoon bacon, ham, porkbelly...