I had it on before update and I just heard plane go by right above me but no notification and can’t seem to find it anywhere.
Go back into your Fly app and see if it was inadvertently turned off. I noticed a few settings that had to be reinitialized after the recent firmware and Fly app updates. After my updates, a test flight recognized several planes so if you're located in the US, it should still be functional.
Also, recognize that not all aircrafts will transmit a signal recognized by the Airsense receiver in the MA2.
Mine remained on but I haven't had a plane fly over while I'm flying yet. To verify if the plane is transmitting you can use the flight24 app.Now I see it. Thank you.