Verified answer
Does Steam Family Sharing include every Digital Deluxe extra?
Quick answer
Steam lists Family Sharing for the game, but the product page does not guarantee that every Deluxe add-on, preorder bonus, soundtrack, or artbook transfers to another family member.
What this means
Family Sharing is governed by Valve’s current entitlement and simultaneous-use rules. Buyers should verify each add-on rather than assuming the base-game badge covers all package contents.
Official source
Steam — current feature listing
Continue with the relevant guide
Open the related Control Resonant guide for the current topic summary, connected systems, and any later verified changes.
This answer is reviewed against pre-release official information. It states unknown boundaries explicitly and will be revised when Remedy or a first-party store publishes a newer fact.