Chosen Solution

I made the exchange of the complete display of the original iphone from one iphone to another, but the true tone option disappeared, what happens?

This is expected when replacing the screen on the iPhone X. I don’t think there is any solution getting true tone to work on a replacement iPhone X screen yet as I only see auto-brightness fixed solution from this video: https://www.youtube.com/watch?v=t-tLd5FW