Just a warning. It may be displayed clearly somewhere but I missed it.
When I find I’m not getting enough out of an app subscription I’m using, I usually go into my account ahead of the expiration date and cancel. The subscription or trial keeps running until the planned expiration date and ends then.
So, I did the same for the Apple TV+ trial I got nearly a year ago with my new iMac, but it cancelled immediately, even though the UI for cancelling is the same one as for app subscriptions.