YA science fiction, future where many can’t have kids & have hyper realistic robots instead

[Eliana]

I saw this book and flipped through it but never got the chance to read it so plot details might not be accurate. Saw it around 2018-2019 and the main character is a teenage girl who [spoilers ahead] learns she is actually a robot after a freak accident (in a river/body of water?). Prior to learning she’s a robot she was prejudiced against robots. In this society the parents are supposed to raise the robots as human children and never let them know they are robots because it wrecks the illusion and then things can never be the same. I believe after this illusion is broken or maybe when they turn 18, many of the robots are supposed to be returned to the company that made them and are thought to be recycled or something undesirable and the main character is fighting against this happening to her. It might be that robots that aren’t deemed “conscious” enough get sent back because the real goal of these robot-children is to create conscious robots to save humanity. Throughout the story the main character is also keeping in contact via some kind of writing (letters? Ancient technology?) with an unknown man who [spoiler ahead] turns out to be a fellow robot that became conscious. Very unsure about this one but he may be in space. [Spoiler ahead] The main character realizes that she has also become completely conscious at the end I believe.

[Rainbowheart]

Expiration Day

[Eliana]

That might be it! Thank you :)

[Kris]

Rainbowheart's suggestion of Expiration Day by William Campbell Powell sounds like your book. Should we mark your request as Solved?

Here's the Google Books preview: https://books.google.com/books?id=KTO... There are different cover images.

Quotes:
Swearing didn't help, but I did it anyway. Psychology degree at Cambridge? Hah! It was all future. Totally, utterly pointless, because at age eighteen, Oxted was going to reclaim me, and then what? Scrap me? If not, what else?
...
So this is the core of our case. The legalese is watertight. Oxted has absolute rights over its creations. Think of me as a car, or a toaster, or a V, leased to a custodian for eighteen years.

[Rainbowheart]

I'm positive it's the right one. I just hope OP comes back to confirm.