Time varying attribute that was created on an object and then added to the Roadmap Items object using the same alias is not able to sync the values on the roadmaps.
Release : 15.9.3, 16.0
Component : Clarity Roadmaps
Currently the time varying attributes are not supported on the roadmap items.
There are certain situations where the values will sync. These would be some of the money type attributes.
However, they are still not supported.
Though you can see the attribute in the roadmap they are not fully developed for syncing to the roadmap items.
This is being reviewed by engineer and may be available in a near future release.