When will Optum start covering alternative therapies for PTSD, such as Equine Therapy?

I am a disabled Veteran who owns and operates a Therapeutic Horsemanship program for those affected by PTSD. This therapy was part of the VA spending plan, but it is only accessible through the Adaptive Sport Grant. Mental Health is not a sport, so why would Optum Care not cover this therapy? Therapeutic horsemanship programs are available across the US and the majority of them rely on grants and donations. If a program does not receive a grant, then their program is at risk, as are the Veterans who rely on the program to help them heal.