This is probably a stupid question, but am I correct that while on approach, the NG will autotrim to help maintain control even if autopilot is disengaged? I feel like I saw somewhere that it does.

You may be thinking of speed trim, which works at light loads and high thrust settings. You are most likely to see it working if you are hand-flying a takeoff and climb. I suppose it could kick in during approach if the conditions are right.

It does. It did for me earlier today. I don't think it's important what phase of flight it's in, but more the conditions as you state them.

Thanks, I just wanted to verify that. I had a little disagreement with one of these youtube "armchair pilots" who thinks knowing how to press cntrl E makes him know how to fly a real plane. People like that give us real simmers a bad name. But thanks again for the help.