How to cancel a subscription although I’m offered no cancel options

Is the problem that you can't find the subscription, or is it you just don't see a cancel option?

If the former, see: If the subscription that you want to cancel is not listed – Apple Support (UK)

If you still can't find a subscription, contact Apple Support using this issue-specific link at the end of the support article. --> Apple Support

If the latter: You might need to scroll down to find the Cancel Subscription button. If you don’t see Cancel Subscription, then the subscription is already canceled and won't renew. An "Expires" date (instead of "Renews") means the current subscription will just run until then. "Resubscribe" is just in case you change your mind about having it end.

See this article from Apple: If you want to cancel a subscription from Apple - Apple Support

You're welcome.