On A320 (and probably on other Airbus types too) the AoA value is available in Alpha Call up MCDU maintenance pages. However it displays only the values for ADR's AoA #1 and #2 if I recall, the SBY (#3) can't be shown.
I remember some A320 in Air Inter (absorbed by AF in the late 80's or early 90's) had an AoA "analog" gauge displayed just below the PFD/ND control panel, but only on the captain's side.