Greetings Rickree,
When streaming through your Apple TV hardware using a subscription, if this content is included with your subscription we’d expect that you have access to it. However, if the content is not available with your subscription or perhaps isn’t available in the AMC app as a whole or on tvOS, we’re going to recommend that you connect with the content provider, AMC, to find out why.
It looks like AMC has a service called AMC+ and that may offer some additional content for you. Here’s a link to the help page for AMC+ - Support
Thanks.