@patrickzsy I am working on the same thing in this thread: Migration API "[ { property: 'title', error: 'The value must be a string' } ]" Waiting for a full answer. They do offer environments but this should be achievable doing it this way.
You can download the json files via the API and then migrate from there. It is more efficient than previously as you are not restricted to 200 documents per download which was a massive headache for me. You don't have to click through the UI.
You are jumping to conclusions here.