Steam cloud sync for custom scenarios?

[theatertime]

I probably spend half my time with Factorio in the map editor. For a sandbox where I can work on blueprints without burning through resources or passively letting the evolution factor rise. Then turn these into blueprint books, and store them in the "my blueprints" area (I am so glad that syncs with the Steam cloud now).

After my main hard drive died, I learned that the custom scenarios don't seem to sync to the Steam cloud. Since I no longer have the scenarios I used for working on blueprints.
Could scenarios also sync to the Steam cloud? Much like normal game/world saves.