The developer options in the oreo version of the nokia 5 and i have been facing a few issues. Firstly, the srgb mode toggle switches back to off every time I leave the developer options. Secondly, the Bluetooth codecs as well changes to the default for any codec I try to use. I would like to know the solution to the problem.
I believe those options are not required to be implemented by the manufacturer. Perhaps it is the case here because they revert to their default values. Did you notice any changes after turning sRGB on? If no, then that switch does nothing.