A one or two day walking workshop around a museum, transport hub or visitor attraction with staff is a good way to develop a map of what is known to be problematic and what solutions are currently offered.
Maps show value. The sensory map is a start. It provides a sense of place as perceived by the institution and the users it has thusfar encountered and listened to.
The map then becomes a way to communicate with potential visitors.
For some it will show that there is a good Welcome: that there are capabilities offered that support their capacities. For some it enables them to see where the gaps are and what they can ask for.
Showing what you are aware of and what actions you have taken shows that you are willing to listen and take more actions for more people.