"in roadmap" vs "on roadmap"
In software development planning, a roadmap is used to describe what lies ahead. In our industry, we say: "put it in the roadmap". But when it comes to maps, I would search "on" a map.
Do I say something is "in the roadmap" or "on the roadmap"?
An English idiom is: put (someone, something, or some place) on the map TFD
To make some place or thing very famous or renowned; to establish some place as being remarkable or noteworthy.
It works nicely here in your question:
In our industry, we have "put x on the map".