Hello welcome, Adenium multiflorum is a subspecies of Adenium obesum. I imagine that it must be a kind of hybrid that supports colder and more humid climates, because the obesum requires a warm and dry climate to develop well. A few years ago I had a plant in my garden, but it never bloomed and with time it dried up. I didn't know how to take care of it and it didn't get enough sun and I think I also watered it a lot. Now I know, that it is the perfect combination to lead this plant irretrievably to death. Grateful for your visit, I wish you an excellent week and many blessings for you and yours 🙏