I don't want to do anything, but I'm not depressed. Did anyone else go through this?

Just for background info: I don't remember my childhood before the age of 11. I grew up in a very hostile environment. I was the black sheep. I was always very strong-willed, very. And, I would always stand up for myself.
I'm no contact with my family for about 5 yrs.

I'm mid-30's now, and since 32/33, I don't want to do anything. I did come out of survivor mode around that time. I am in the middle of my studies, quite rigorous program. But, I just don't want to do anything. I've never experienced this. I used to be extremely driven.

I'm not depressed. But, it's like, I just want to eat healthy, exercise, and do the bare minimum to have decent living. When not working/studying, I sit around all day and I just pass the time away. I'm not even doom scrolling. Mentally, I'm not nearly as sharp as I used to be. But, it's like, meh. I would like to be sharp again, but I can just get by like this, as well.

Deep down, I think I'll be happier if I moved forward with goals and improved etc etc.
It's like, there's just no resistance to this state. So, can anyone help me at least understand? Preferably those with experience.

How did I go from being so driven, intrinsically, to not being in a neutral state and not wanting to be moved? Where does one go from here?