Post op treatment for melanoma

Good morning,

I feel a little confused! I had my first oncology appointment yesterday after having lymph node dissection surgery 10 weeks ago. I was diagnosed with melanoma earlier this year. My post surgery letter states that my BRAF mutation test was negative. I went to the appointment after doing lots of research expecting to talk about immunotherapy, however, I was totally confused when told targeted therapy with tablets would be my treatment. I’m confused. Could you please clarify for me whether targeted therapy is for a positive BRAF test or can be used for negative please?