Go into DJI go 4 app. Connect to drone and click on the 3 dots in upper right hand of screen. Then click the drone icon, Scroll to bottom and click advanced settings. That’s were you can find and adjust the gain settings.
You pay USD 10 for 2 props MA from DJI , you get 4 Master Airscrews for 19.99. I even spent USD 12 for delivery to Malaysia but it is worth it. Lower noise for sure, extended flight time? Frankly speaking if one can measure it is marginal as probably most of us return home at 25-30% so you bring your bird down and will still have 2- 5 min left depending what you were doing. I realised today that when landing the MA and I removed the props, the motor is hot. Will have to compare with DJI props.