I never fully got CLI apps deployed but i m going to try to replicate. I reached https://dev.wix.com/docs/wix-cli/guides/get-started/quick-start-an-app#step-2--test-the-app but once the app is installed in the site i dont see anything on the site ... neither a widget nor a dashboard or anything else that i could understand being rendered by this skeleton...
I ll try adding and extension but so far not sure why the wording "Test your app" is used
The Wix CLI is in Developer Preview and is subject to change. This guide explains the minimum steps required to get a CLI app up and running using the Wix CLI.