Generally speaking, you may want to deploy lakeFS in one of the accounts or both, depending on which data you would like to enable versioning for.
If I understand correctly, you would like to have git-like capabilities on your dev environment, while also reading data from the prod environment. Is my understanding of the use-case accurate?
To support you in the deployment process, we would like to understand the exact use-case. You are welcome to describe a typical workflow, with as much details as possible (you can PM me if you prefer).