Catching up on all the comments brings me back to the GG thread during her 2019 vlogtober. It strikes me that nothing in her life has improved since then. In last year's vlogtober, she was constantly complaining of tiredness, constantly having "off"/unproductive days, and did nothing but read and go to the gym. There was even speculation about the possibility of depression similar to the comment above me.
It's hard to say since she shares so little of herself these days, but I'm personally on the fence as to whether she has something like clinical depression. Things like her low energy, low motivation, etc. can easily be because of things like low iron/nutrient deficiency from how poor her diet seems to be. And just the fact that her life is purposeless and unfulfilling can explain her apathetic moods.
I think like others have said, 'laziness' is just part of her personality. In Q&As from years ago she'd always say there are 'so many things' that she wants to do with her future, but in really abstract and impractical terms. She probably likes the idea of doing things, but isn't willing to put the real work in to take action. I'm also shocked that her parents tolerate letting their adult daughter hang around the house all day doing nothing.