Sorry, I was not clear. You can do a clone of shopify in liveview, but cannot use shopify with liveview because it’s not powered by phoenix.
What You can’t do is PWA with liveview.
I feel liveview was done to replace js, because of the complexity of js tools (webpack, framework). And that’s the way it is promoted, no need for js.
But if You master any of the js framework, You have already a powerful tool, that can do what liveview does, and more (PWA), but with state on the client.