Should be similar to V90
try
settings,
controls
and adjust interior brightness down do around 3/4,
it won't show any difference until you are out driving in the dark.
If you want to see how dark the screen is cover the sensor at the base of the windscreen in the centre of the top of the dash with the owners manual pack.
It will work, if there is no response, try resetting the centre screen and trying again.
https://www.volvocars.com/ie/support...a801512c8f5561