iOS ARKit - Calculate the degree of rotation of device in all three direction

I want to get the degree of Rotation of all three axis. I am trying to achieve with landscape mode. When rotate device from left to right (Y-rotation), I want the degree covered once user set a left end and rotatae to right. So we need the degree 360 when it reached the starting point. So for the y-rotation, using the following calculation and it is fine.

let q = sceneView.pointOfView.orientation
let yRotation = Float.pi - atan2f( (2*q.y*q.w)-(2*q.x*q.z), 1-(2*pow(q.y,2))-(2*pow(q.z,2)) )

Ref: Getting the rotation of device around the world origin's y axis in ARKit

Similarly, want the Z-rotation, for Z-rotation , no need for 360 degree rotation. But need accurate value when rotate about upto 90 degree This is fine if we use the

var zRotation = sceneView.pointOfView.eulerAngles.z

But this will be wrong* if we rotate the device on left to right (Y-direction ) some degree and then check the Z rotation, we will get the Z-rotation values as near to 180 degree rather than near to 0

So tried a bad way to get the Z rotation like:

var zRotation = sceneView.pointOfView.eulerAngles.z
if abs(sceneView.pointOfVieweulerAngles.z.toDegree) > 90 {
    zRotation = (abs(cameraNode.eulerAngles.z.toDegree) - 180).toRadian
}

But this is not accurate, we can see a jumb the Z-rotation value when subtracting 180.

Could you suggest a proper method..

X-rotation value is simialr to Z-rotation, getting values near to 180 when check after rotate left to right (Y-rotation) some degree.

Thanks

from iOS ARKit - Calculate the degree of rotation of device in all three direction