How to add Shopify to you community? I'm not seeing it with my other app options.

It turns out that they don't have Shopify yet. 

Tribe's support suggested I check the roadmap here: https://www.notion.so/07eecdaf0b6c4b3692cb3399e07cb59f?v=fa1a0efc5c7842dcb50aa0fd38907e7282

And yes, they do misleadingly list it as a feature that's ready to go:
https://tribe.so/app/shopify47

https://tribe.so/pricing33