How to get ARKit camera texture without movement?

I would like to get the ARKit camera passthrough material to place on a texture in game. However, it appears that this texture requires “Start in AR” to be enabled in order to work, but this also takes over the camera’s movement controls. How can I get the camera passthrough texture to work while still keeping control of the camera’s movement? (I know there’s a plugin for Android, but I need this on iOS specifically)

Can anyone help?