I think maybe you just got lucky. My first Model 3 was sort of quiet (just wind noise, Model 3s and Ys are quite loud compared to other similar cars). My current model 3 (a 2023 model) has a whistle at highway speeds that I haven't been able to isolate. Along with a fluttering sound, which may be related, and sounds like it's coming from the passenger side mirror area.
The next Model 3 ("Highland") uses laminated glass in the rear windows, whereas the current one just uses it for the front. Should be the quietest yet.
I've seen a Model 3 with very similar sounds coming from the passenger side mirror. There was a loose piece sticking out of the bottom, pushing it back in fixed it.
The next Model 3 ("Highland") uses laminated glass in the rear windows, whereas the current one just uses it for the front. Should be the quietest yet.