Is (brainspotting/somatic experiencing therapy/hypnosis/neuro-linguistic programming/equine therapy/art therapy/thought field therapy/rapid resolution therapy) an evidence-based treatment for PTSD? No. These are not evidence-based. You can certainly try them! Some things may work for you, individually, that have not yet been studied sufficiently in scientific research. Generally, it probably makes sense to at least begin with one of the therapies with the most scientific support (PE, CPT, or EMDR) before investing your time, money, and energy into other forms of therapy.
If you have PTSD, I encourage you to seek out a professional who is committed to evidence-based treatment, and is well-trained in PE, CPT, or EMDR. If you haven’t had these treatments yet, know that you shouldn’t give up hope.