just my thoughts - i don't think she's losing it or that she's necessarily unhappy. there may, of course, be some of her posts that are for the benefit of anyone monitoring her social media and reporting back to the Narc. A lot of people would want to show a nasty ex partner that life is good /better without them.
i do think that people who rely (even partially) on social media to promote their business are under pressure to be constantly providing content, and to keep their engagement high.
if you can afford it ( & you can be arsed) there's little wrong with having your hair done every week, i did before i had children! and lots of us take our children out to eat, but don't label it 'date night'- again, that's the pressure of social media i think! and yes, i agree that little Aamira would like a wee trip away, what child wouldn't - maybe there's a summer holiday planned. Overall i think Talitha, from what we see, is a great mum - i'm sure she could be in a relationship by now if she wanted to be ( & maybe she is but isn't plastering it all over the gram). she's dealing with the aftermath of living with an abuser and the treatment he dished out ( been there too, unfortunately) & she's doing a fab job with her children while she's working through all that herself.
she'd have some way to go to match the level of self indulgence her ex husband is displaying, with no mention of the little girl he has left behind while he splurges to impress followers and the current girlfriend. Even if he is paying maintenance, it's easy to throw money at a situation- putting the actual work in is the hard bit.