IIUC, apps that use the microphone in iOS make a red bar appear at the top (as if you were in a phone call) when you’re not in the app. For this not to be the c

IIUC, apps that use the microphone in iOS make a red bar appear at the top (as if you were in a phone call) when you’re not in the app. For this not to be the case with Messenger, Apple would have to collude with Facebook.