Anyone take sleep anxiety therapy and how does it work and was it helpful?

I have severe sleeping anxiety, and I wanna see a therapist to address this. I’ve seen Therapist before for other anxiety issues, but sleeping anxiety is my biggest and worst type and was never addressed. Even with strong sleep medication, my anxiety is still so bad that sometimes fails to work. What happens during anxiety therapy? And people have taken it, have they found that it helped the issue?