Samsung SM-F741B Galaxy Flip 6 LCD Display including Touchscreen/Digitizer and Frame Assembly Complete - GH82-35014B/GH82-35013B - Yellow - Starting from the Flip/Fold 5/6 models, it’s possible to calibrate the new screen via the official Samsung Self Repair app in the Galaxy Store.
If the internal screen doesn’t turn on from the start, place a magnet on the top back of the device, and the internal screen should turn on.
Then, go to the test menu (#0#) and select Hall IC. Remove the magnet from the back and exit the test menu. Now, open the Self Repair app and calibrate the screen. Within a few seconds, your new screen will be calibrated, and everything should work properly.