What makes you think she is neurodivergent?
Sounds terribly unscientific but its a vibe I get from her. Since being diagnosed I feel like I can sniff out fellow neurodivergents a mile away!
For me it's the angst and "immaturity" in the lyrics, the difficulty in relationships. Her slight awkwardness, the flapping when she's excited, possible eating / weight issues, difficulty with food textures, obsessions and special interests.
I'm aware the above are all human traits and it's very hard to know where a cluster of traits turns into adhd / autism so it could just be that she has those traits or that they're due to something else (trauma / anxiety/ BPD can often look look like adhd and autism and vice versa)
Currently you only tend to be diagnosed or considered a problem if you're not able to contribute to capitalism - conveniently ignoring the mental toll on "high functioning" or "high masking" people. My husband and I are high functioning autistic and adhd respectively but we've been on anti-depressants our entire adult lives because the "productive" lives we lead are very difficult to cope with and involve us masking / suppressing our true selves.
I can see why a lot of people would write T.S off from a neurodiverse perspective (she's rich and successful so can't have it) but some people are lucky or privileged enough to harness the positive "power" they have. I'd imagine it's less of a barrier to a blonde attractive, white, middle class talented girl than it is for a person of colour who is working class and comes from an unstable home for example.
Again not saying she does have it just trying to broaden minds about how it looks and affects people. People get very defensive about "armchair diagnosis" because they think saying someone is anything other than "normal" is a huge insult and that to me reveals an ableist mindset which I think the vast majority of us have, myself included.
Btw, not trying to be combative just pre-empting the pile-on from people who see being different as something awful.
Sorry for the essay, my adhd meds have kicked in