Okay, this is what we are actually planning to do, we're just waiting for Shopify to tell us our store is finished cloning. Thanks for your help.

Do I have to disable captcha for my live store, or is this somewhere else? Thanks for the clarification and your help in the matter.

Current Shopify CLI version: 3.46.5

The absolute newest one. 

Using the CLI command shopify theme dev command, I'm unable to log into a customer account to be able to preview/modify those templates. My guess is there's some kind of authentication/cookie issue since it's at http://127.0.0.1:9292/ but this is a s...