If you are talking about Viewing the details of Navigation and/or driver instructions in sessions that have them, then YES. These are working for me in Cab View in Build 111831.
Example KSC 2 - Highland Limited. Once the camera view exits from the scripted pan and control is handed over to the user, then if I go into Cab View mode, the session's Nav Display instructions/ icons are visible from within the cab and I can click on them to reveal the details.
On the other hand, the Right-click View Details... (menu item) Does NOT work in Cab View. Think it is this to which you must be referring. Did that ever work in Cab mode though? I cannot recall being able to use it there before.
Just tested in T:ANE. Right click, View Details... is not available in Cab mode either.
On the other, other hand, Bet you that you can view the details (of the current loco) from G.M.'s beaut little Set_Driver_Conditions_Rule from within cab view. He added that functionality recently.
Edit Update: Yup - just tested this. It DOES work in Cab mode using G.M.'s wee helper!