Spoken directions on Apple Maps over BlueTooth on 2015 Chevy Equinox

Until about 2 or 3 years ago, I used to be able to get spoken directions from Apple Maps when listening to the radio on my 2015 Chevy Equinox, when my iPhone was connected via BlueTooth. It would interrupt the radio briefly to give the directions, and it would appear as if a call was active for a few seconds. There would be an option in Apple Maps to use "Chevy Equinox" as the output, rather than the dock connector. About 2 or 3 years ago, this stopped working, since I could no longer find the option to control the audio output in Apple Maps. At the time, I was using an iPhone SE, and thought maybe it had something to do with the phone. But now I have the same problem with a brand new iPhone 16. Did an iOS update a few years ago break this feature, with no way to fix it? Or am I doing something wrong? I can only get spoken directions if listening to music on my phone through the USB cable. It would probably also work if listening to music through BlueTooth. But I'm asking how to get it to interrupt the radio, which it no longer seems to have an option to do. Thank you.