Do any one of these, try a different method if your primary choice didn’t work:
- On any of your Apple devices: How to cancel a subscription from Apple - Apple Support
- On the web: How to cancel Apple TV+ - Apple Support
- On third party devices with the Apple TV app: Manage subscriptions in the Apple TV app - Apple Support
- On a PC with iTunes: Use a Windows PC to cancel subscriptions from Apple - Apple Support
Under Account there is no "settings" section.
On the Apple TV+ web site, when already signed in, in the top-right corner should be a round icon, representing an user portrait. It accesses account options: Settings and Sign Out. Choose Setting. On the next page, scroll down to Subscriptions. Find the Manage link, click that. If you want to cancel, choose Cancel Subscription there.