From the 320 Series FCOM
The AP /FD Limits bank angle as follows:
• 15 ° when the aircraft speed is below the maneuvering speeds (F, S, or Green
Dot speed) -10 kt
• Then linear increase to 25 ° up to maneuvering speeds (F, S, or Green Dot
speed) -3 kt
• 25 ° above maneuvering speeds (F, S, or Green Dot speed) -3 kt.
For Engine Out it's the same.
I'm not sure I understand your question. Basically VAPP is manuveur speed in CONF 3 or CONF FULL - why would you want to bank > 25° at this stage? Even on a circling approach (FD's off) you shouldn't bank more than 25°...... and VAPP is going to be VLS+5 so, theoretically, at VLS+2 (maneurver-3) you can still get a commanded angle of 25°.
A4