I need help - 2018 Impreza noise

I need help - I have a 2018 Impreza sedan. For the past month or so I have been dealing with this terrible sound and for the life of me cannot figure it out. The car has about 85k miles on it, runs and drives fine. However, once I hit about 40 mph around 2,500-3,000 rpms, the car is making this low droning sound - different noise than the engine. The sound gets worse as the car coasts or starts to decelerate and then the noise gets even louder. If it’s humid, windy or raining the noise is also much louder. I have so far ruled out the heat shield and I have no reason to believe it’s the trans as the car is shifting fine. Possibly wheel bearings… maybe…the car isn’t pulling or shaking so I’m not sure it could be that. Also, I just got new tires a couple months ago and oil has just been done recently so any issues with that can be ruled out too. What could possibly be the issue?