If you don't break the entire lcd, but only some part of it, the True Tone will still there. I have mine fixed because of the liquid damage. I only replace the LCD, not the fullset with the case. I have some locals to help me fixed it for me. So I don't know the details how they repair my macbook.

They gave me 2 options,

first told me that I will lose true tone feature if I replace it with the fullset lcd,

the 2nd option, If I replace the LCD only, the true tone still there because they can move the "ic" to the lcd replacement. But the disadvantage for the 2nd option that I will got some defect on my screen not much and not really visible if I don't really look at it. Please note that this options is possible because I didn't break the entire lcd.

I chose the 2nd option and it's work. The defect caused by my liquid damage is not really visible