There's also an alternative here, but this one is only applicable if you've paid for your Apple Music subscription using Google Pay (or if you've generally subscribed to an Apple Music service using Play Store payment overlay).
If that is your case, you can go to your Play Store app, or to a Play Store page
, to see either a "My subscriptions" or a "Payments & subscriptions" button (desktop and mobile, respectively).
You may also have to click your profile icon to see this option in a Play Store app (the "Payments & Subscriptions" menu also has several other options, but the one we're going at it, obviously, "Subscriptions").
After that, you should be able to see a list of your subscriptions, with the ability to manage current subscriptions and remove expired ones.