If you are unable to see Apple Music or other providers in Google Home in iPhone, make sure your iPhone Language Region is set to the region you purchased your iPhone in. When I set up my new iPhone, I had selected US as the region and hence I got “No Default” error and couldn’t see Apple Music. I then changed the language region to English Singapore and magically Apple Music option now appears. When I use English UK it works also. But English US doesn’t work for me. On my Google Home language settings, it doesn’t matter as my Language is set to US and works fine. But u may want to set to same language as iPhone language region.
