I would like to clarify that accessibility is not a program. Every employer has a responsibility, a duty, especially in the public service, to ensure all employees can participate fully and equally in the workplace.
You're absolutely right that a supervisor has the biggest impact on an individual in a workplace; the person you report to every single day. What we found is that there were varying degrees of awareness across supervisors about accessibility concerns, especially if a disability was an invisible disability. We saw that departments didn't consistently require training in this area. That's just a first place to start.
More importantly, the government had put in place an accessibility passport, which was supposed to be a tool that employees could use to support a dialogue with their supervisor. However, there is very inconsistent application or use of the passport and a lack of awareness among many supervisors. That passport is supposed to help a person as they might move around the public service to not have to keep repeating what that they need, so that every employer and supervisor knows how to support them better.
I think the public service is at the beginning of this journey, but it is time now to invest some time and energy into making sure that the experience of every employee, whether they identify as having a disability or not, is equal and level, and that they can fully participate.