Pros and Cons of silicone roofing.

Hi All, I bought a house (California) from a flipper who added this addition to the front of the house. Unfortunately, one part of the roof slopes towards the house, and I see wet areas on the side wall. Is it possible to redirect the water with something as simple as a rain diverter? Or do I have to really get this fixed at the structure level? I could really use some advice. Thanks. Edit 1: Thanks for the replies all. I will add more photos when possible. I had a roof inspection, checked the builder permits, and have a builders warranty. I don't think I'll have to pay 100% for a full fix, but the time in getting that all through worries me. I don't want to let this problem last as we are heading into wetter months.