Im trying to cancel my HBOMax and Disney subscriptions from TV. Can you help?

It depends on how the subscription was started.

1. If these subscriptions are billed through Apple (started in-app on an Apple device), then you can cancel those as described on: If you want to cancel a subscription from Apple - Apple Support. You can also cancel such subscriptions through the Users and Accounts page in the Settings on Apple TV. Manage subscriptions on Apple TV - Apple Support.
2. If you started the subscription directly with the content provider, then you should also cancel directly with that content provider (usually on the web).