I had very low mileage compared to my 2018.
Run tank almost dry. Fill with 93 oct from a newer BP or shell station. Reset the ECU. Drive the crap out of the car. Wide open throttle 1st, 2nd, 3rd, ss close to redline without going to jail over and over for about 20 min. Your fuel and timing maps will correct. Then always run high octane from a good gas station.
The 2019 maps are very finicky. Seems VW was way too aggressive with timing at low RPM if I had to guess, as I was noticing much higher oil temps than my 2018 when driven hard.
Do this for now and you'll be good until VW sorts out the tune. You aren't imagining low mileage, it's a common complaint with the 2019.
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