Anyone go to sleep anxiety therapy and how does it work and was it helpful in addressing anxiety that keeps you from going to sleep, staying asleep, and waking up refreshed?

I have severe sleep anxiety, and I want see a therapist to address this as my ability to go to sleep and stay asleep and wake up refreshed is getting worse. I’ve seen Therapists before for other anxiety issues, but sleep anxiety is my biggest and worst type and was never addressed. Even with strong sleep medication, my anxiety is still so bad that sometimes even these meds that knock people out fail to work.

What happens during sleep anxiety therapy specifically? And people that have taken it, have they found that it helped with the issue?