Kris, you see it only in the tool area of fluidd within the print.
The flow rate is set as part of an internal macro analyzing the camera pictures with some AI.
The normal print starts after that and the manual move area disappears!
Another point is to set right print temperature before the test because the PA & flow rate values change with print temperature and print speed!
I usually set print temperature to ~80% of whats proposed by vendor.
Example: My Elegoo Rapid PETG has 230-260°C temperature range, I multiply the higher value by 4 and add the lower and then divide the number by 5 rounding to next 5°: 260*5+230 = 1270 / 5 = 254 = 255°c in the profile. I used this also for the hardened steel nozzle on Qidi and it worked so far for all filaments. I printed only two temperature towers on K2 so far for very special filaments.
My flow rates for the different filaments are 90% over extruding, 8% under extruding and only 2% right on spot.
p.s.: It is important not to set the Enable pressure advance flag in the filament profile used by the test because it would overwrite the measured PA when print starts!