Thank you for your Feature Request 🙏🏽
As a workaround, you can use Separate Dimensions on the 3D Position and add the individual z value to the EGP without a problem.
For Orientation, you can add an Expression Slider to the layer and use the following expression on the Orientation Param:
[value[0],value[1], value[2]+effect("Slider Control")("Slider")]
Add the Expression Slider to the EGP and now you've got a way to control the z value of the Orientation working!
Cheers,