That whole area is called "attitude indicator" it shows ...
View attachment 106345
It's required that the mobile device have an inbuilt compass for the direction to work ... if it works the north icon will rotate & always point north when you with the RC/mobile device rotate ... this to aid you to pointing your RC towards the Aircraft, you can't lock it in certain direction. If it's locked at "9 o'clock" that either means that your mobile device doesn't have a compass or that you haven't given GO4 permission to use it.