They have removed data free streaming in it's entirety. They give customers free access the subscription of Apple music but the data usage still counts towards your monthly allowance.
I'm with Peter, the value wasn't really there and I think customers realised that.
Plans from July 2019 do not support data-free Music and Mobile TV Streaming as an optional extra.
Data usage charges will count towards the plan's data allowance. You'll need to refer to your plans critical information summary for a run down of your inclusions.