Not every therapist who advertises as a Christian counselor approaches therapy the same way.
The range of extremes goes from those who state: "I'm a therapist who just happens to be Christian" to "Biblical counseling."
In the former, the therapist doesn't bring any aspect of Christianity into the therapeutic work and nothing distinguishes this type of work from secular therapy.
At the other extreme, Biblical counselors reject any insights from modern psychology and use Scripture as the only lens to understand your difficulties.