What journey are you on? I believe this function is already in the app, I was on the Hybrid Strength JOurney for more than a year and I always had this feedback.
The feedback may be phrased like “how was your form” but form is a function of weight as if the weight is too heavy, your form would be impacted. I believe that’s how the Coach gauge whether or not the weight is too heavy now.
And yeah this possible in the app. If you modify the weight you’re using during an exercise, you can tap the « C » button on the top left hand corner to tell the Coach what weight you are currently using.
Then all your feedback will be based on that new weight you just input.