I deliberately seek put therapists who do not incorporate any religious or spiritual bent from a therapy point of view. They may have it, but I don't want to know about it. The two I see now have both told me their backgrounds, without me asking, which include two different religions, but beyond that, the subject has not come up.
There are those who advertise as specific religion affiliated therapists around where I am, so if someone is looking for that, I think it can be found.