Lacking empathy

[curtaintwitcher23]

Is it a common phrase for young teens to seem to lack empathy?
Whenever we watch tv with 13 yo she constantly makes sarcastic comments and says negative things especially when people are being genuinely emotional or kind.
I sort of feel like she sees us (she's around adults a lot) being judgmental and is copying without having learnt when it's not ok or when it's ok to acknowledge some things are sad/sweet etc
But was wondering if this is natural phase that will pass or something that needs addressing, it really grated on me and I'm concerned if she acted like that in front of other people it's not very endearing- she is quite sensitive in real life situations.

Well the first question is, just how judgemental are you if you think this is learned behaviour?

Cynicism and judgement is a pretty normal element of adolescence – and if she's sensitive in real life I wouldn't worry too much.

Maybe start gently commenting on things on TV in the way you'd like her to, and allow it to seep in over time? Not in response to anything she says, but just general 'wow, that must be hard for X' or 'That's lovely, isn't it? I'd hope someone would do that for me'

@SiouxsieSiouxStiletto it's true I have reflected on that, I think just normal stuff like 'I can't believe that's true' but I do consciously try to reinforce saying positive and nice things too now, @travelingtortoise great advice thanks I will definitely work harder to comment on the emotional and nice things.
I do think it's about trying to fit in with us and maybe she's mirroring us and it's a good opportunity to check ourselves.