Service Menu for Kogan 50" 4K HDR LED TV (Series 8 JU8100)

I purchased this TV from this deal.

I found the code to access the "service menu" today after updating the firmware.

To access the "service menu": press the "menu" button on the remote control followed by the numbers "1147".

I found the extra settings under display settings like the HDR settings quite good. There's settings for backlight adjustment and more.