Cak
There is no acceleration altitude in missed approach.
Then why does the PERF GA page has the THR RED/ACC and also ENG OUT ACC blocks? Even with terrain you can have an acceleration altitude provided the company has studied the terrain and it is possible. However you don't plan an approach to such demanding airport without preparation. The acceleration should have been planned after the turn. Flap 3 and 2 are take off configurations it is possible to retain it till appropriate. Any time you want to stop acceleration you pull speed or what prevents you from selecting flap 2..