You should be OK using 2-3 minutes, maybe even 0. I've seen some veggies only take 0 because they cook as pressure is building. I stuff my peppers/cabbage with raw filling so this is only a guess. Found this:
https://eatinginstantly.com/instant-pot-steamed-vegetables/#:~:text=Add%20the%203%2F4%20cup,all%20that's%20ne eded%20to%20steam!