I’m an hour into a support call with Apple, and have given up.
In summary, did Apple remove the “Show Apple Music” option in iOS 14 (Settings > Music)?
I wonder if that shows on yours because you aren’t a member? I have a subscription with Apple Music and therefore I assume that’s why it doesn’t show on mine.
I just went into music settings and it quickly flashed show music and replaced the page with one similar to the one that Stumpybloke shows above. I have a subscription.