Heat Damaged Amoled Display

[Jakub]

Hello, everyone
I have a question as a not very skilled electro technical.
I've been replacing battery on galaxy S9 and when heating the glue i accidently didn't contfol the temperature and burned my display. There is a yellow mark on the screen when it's on/off. It's some light reflexive yellow-goldisch

Any idea of what could happen inthere, or a possible repair

Thanks a lot
Jakub