From https://scrumexpansion.org/
“The Scrum Guide Expansion Pack is a comprehensive companion to the 2020 Scrum Guide , created to help professionals navigate today’s complex product environments. It deepens understanding of core Scrum principles by offering additional guidance on complexity, product thinking, systems of work, and leadership; while remaining true to Scrum’s ethos of empiricism and self-management. It’s not a rewrite, but a strategic amplification to support long-term, value-driven delivery in modern teams.”
Check out https://scrumexpansion.org/