Is Flowers for Algernon sci-fi?

I finished reading Flowers for Algernon recently. I genuinely enjoyed it but as I progressed I felt it was closer to a human drama than a sci-fi book. I was surprised since it has been recognized as a sci-fi book for so long and won the Hugo and Nebula awards. I was wondering what others thought about it. I will add my rationale below (spoilers).

(Spoilers). The first thing is how shallow the science is, there is only one moment when is commented with ant type of depth and that moment has more big words than science backup, in my opinion. I know it is a book of its time, but I especially missed Charlie doing physical experimentation, taking tissue samples or applying the science that was explicitly mentioned in the book as the source of his intelligence when doing his own research.

The second thing is that the experiment feels like a device to trigger Charlie's specific human drama and to walk us through his childhood trauma. It is an amazing mechanism for that, but I expect sci-fi to hace societal impact and deeper world building. It is a bit reminiscent of the movie Awakenings, that uses specific medical procedures to give someone a window to experience life.

I also feel that the lack of stakes when Charlie escapes and takes Algernon with him are underwhelming, the research lab just let it happen and they don't engage the authorities to bring him back or, at the very least, to retrieve the most valuable mouse lab in the world. It felt as another mechanism to advance the human drama.

Lastly, and this is a common pattern for this theme, there is no time for Charlie to learn all he learns, even with super intellect, he needs to go through the regular knowledge absorption methods of reading and studying, and in a few months, there is just no time for that. He can be a genius, but a genius won't be a neurosurgeon without taking the time to learn.

All in all, I feel that as the tragic story of Charlie the book works exceedingly well. It is cleverly written and Charlie's progress (or lack thereof) felt earned. I would have liked Charlie to be less of a jerk when he became intelligent, but that is of course a creative choice. It does brings a very clear separation between emotional and intellectual intelligence that it is undeniable in the real world, so I can believe it.

I am glad I read it and would recommend it, just not as sci-fi, not sure what others think.

My two cents