Where I live there are the percentages for religious affiliation is the same for hearing and for Hoh/Deaf. There are more Hoh/Deaf Christians in my area simply because we have a large Christian population in general. I do know Hoh/Deaf who are Jewish, Muslim, Hindi, Agnostic and Atheists as well though ... in similar populations to the hearing in the area.
Generally people follow the faith in which they are raised, so ones parents are practising Christians, it's likely that the children will either be Christians if they are religious.
We have a number of denominations that have ASL Church services, including the RCC Church of the Deaf (ASL is the language used by the priest, readers etc), and a number of non-denominational Churches where ASL is the language of the service. A number of years ago we had a United Church , a Lutheran Church and an Anglican church that also had ASL services. Unfortunately budgets have cut the amount of signed services (other than RCC and non-denominational).
As an Anglican Theology/Seminary Student - it is my hope that we'll be able to once again have an Anglican & Lutheran ASL service available on a weekly basis (where ASL is the language of worship, instead of an English service with ASL interpreters)
I'm not sure if that answers the OP's question or not ?