Cancel subscription

You can't remove the payment method if you have an active subscription that needs it.

You need to cancel the subscription first.

Follow the steps here: link-> How to cancel a subscription from Apple - Apple Support

Yes except for iCloud Storage any subscriptions can be found and cancelled by following the steps in the link I provided above.

Here it is again: click here-> How to cancel a subscription from Apple - Apple Support- Apple Support

Cancel the subscriptions from there. Make surer any and all subscriptions you see there that you do not want are completely cancelled.

If you are the Family Organizer in a Family Sharing group, you will need to verify the subscriptions on the Apple IDs of other members of the Family Group.