Navigation in Driver Display

[sayokama]

The button that appears on the car navigation is inactive, I'm interested if anyone knows how I can activate it

You need to switch to the bigger navigation package, when done you also need to feed your car with a USB with correct maps. Once done you can choose maps in the middle screen.

I don't know how I can do this, can you give me more details, in private if you can't here, it would be a great help to me

First: make sure it's enabled in the configurations (the config you could see in a comment above).
Secondly: download may and feed it to your car. You could see the instruction here: https://www.volvocars.com/nl/support/dow.../maps/spa/
Finally: your navigation section should be available on the middle screen. And in the configuration of the central unit you should be able to turn the navigation on the driver display even with no active navigation.