Family sharing - can view movies on iphone, but not on Mac

I am a recipient of family sharing. I am able to view movies on my iphone via Apple TV app under the "family sharing" link, but the "family sharing" link does not show up on my Mac in AppleTV app.

I've checked to make sure my apple ID is correct; logged out; logged back in. Restarted computer, etc.

I can't figure out why I can view the movies on my iphone, but not Mac????