My Air 3S alerted me to nearby planes for several months after the purchase early this year. It & the RC2 controller have had updates since. It seems like one of those updates has turned the function off.
I fly in the edge of Class D with LAANC...
Hi there and welcome.
I do worry that your forum name is likely to confuse people though - maybe you should change it with prefix, such as Bob-The-Mini5Pro, lol...