On iPhone, I can listen to audio messages but my phone won’t allow the microphone to stay on and be used in order to respond, although it isn’t an option I can block or whitelist. This happened during a session where I had certain apps whitelisted, but I had to delete the app in order to be able to respond to the message because it would not allow me to use my microphone even though the messages app itself was something allowed as well as voice memos.