Is it a creaking noise when turning to the left especially on bumps. If the noise developed more then you should bring it to the service department. Mine in Texas develop a sound around 1000 miles and it is actually the front left wheel shock absorber housing to the chassis that cause the noise. It is under work order to be replaced by infiniti, the parts still in backordered.
I am having the same issue i have had my 2019 QX50 for about a month now. it has around 1000 miles on it and i hear that noise every once in awhile. it is a loud vibration noise coming from the same spot you are describing.
Bought my 2019 QX50 in 2018. Love the handling and interior detail, but I have a clicking noise coming from the sunroof when I go over driveway aprons or even sometimes on the open road. Had it to the dealer several times - noise is still there.