Is this your test?
First observation is that on the whole it looks fairly legit. It looks like you were in manual mode and not erg mode, and looks like you went out a bit hard at the start of the 20 minutes but then found the right level and held it.
Second observation: based on your 20 minute watts, you over-cooked your warm up. Your 3 1min efforts at the start were done as if your FTP was 200 watts, and your 5-minute effort was done as if your FTP was 150. So that might have taken a little too much out of you before you started the 20 minute effort.
Recommendation 1: check your trainer is correctly calibrated, follow the instructions carefully.
Recommendation 2 (assuming there was no massive change with the calibration): if you repeat the 20 minute test, set your FTP to 138. Then when you start the 20 minutes, start at 146 watts and stay there for at least 10 minutes. If you feel like you can do more, start ramping up the intensity slightly until you’re going all out for the last few minutes.
Recommendation 3: put the trainer in erg mode and do the ramp test, then see if the numbers compare.
Recommendation 4: start a training plan with the number you get and just see how it goes!