As posted above the FPV in boeing and airbus is not completely inertial, it receives air data input as well. Boeing used to promote its use in some non normal scenarios but have since removed those remarks or put some in that warn pilots not to use the FPV.
For AoA indication boeing offers an AoA gauge on the PFD as customer option which takes the place of the circular RA gauge above the AI, RA moves to the bottom of the AI as digital output only (737, might be different on other types).