We published an article on Medium to help teams understand what a Stripe account migration actually involves.
It walks through the process of moving products, customers, subscriptions, and related billing data from one Stripe account to another. If you want a quick overview before scoping a project, it is a useful place to start.
If your situation involves an acquisition, a legal-entity change, or application-level dependencies tied to Stripe IDs, the article is a primer rather than a replacement for project-specific planning.