Bro it's not acutually due to an update but display's flex cable is getting melted over period of time because of heat generated by the device and surroundings.The factory flex cable of 20,21and22 series are more prone to melting the flex cable due t...

Can you share a pic of your 23 ultra display with the settings that i mentioned above.

5g will only work with airtel and jio 5g does not support on non indian variants

Enjoy your device.don't ever think about replacing the display because the green tint does not look like this.

Your s23 ultra's display is perfectly ok as i don't see any problem with it.You are good to use it.