Roadmaps cover future work and vision, but this can be done at different scopes, from everything related to the product to only the UX activities and priorities, possibly narrowed to a sub-specialty of UX.
A roadmap documents upcoming and future priorities for your user experience. The process starts with gathering goals, proceeds through the creation and sharing of the UX roadmap, and never ends, since the last step is to update.
Research with people who are learning Design Thinking shows that they progress in a nonlinear manner through 4 phases of increasing competency and confidence. Understanding these phases helps both learners and educators/managers.