For my communities, I think it's just being able to access and use the language of their choice, whether it's a sign language or being able to have assistance through closed captioning, etc. For a deaf individual, calling Service Canada is very limited.
Also, I shouldn't say just Service Canada: Calling any department within the government can be quite challenging. In going to visit a Service Canada location, there are a lot of barriers to audio accessibility or to being able to access a sign language interpreter. Just being able to interact with the government in the language of choice or in an environment where you can communicate continues and will continue to be a struggle.