She’s a special case, her body is genetically more aligned with a woman’s, so hormones are enough to trigger the changes. For other trans people, it’s harder; hormones might not work as well if their body resists the changes. Surgery is usually just cosmetic, enhancing or removing certain traits.
As for genital surgery, that’s a completely different matter, and I can’t or try speak on it. I don’t know your situation, but if your body resists hormones, changes may take years to appear. Surgery offers faster, external changes but remains cosmetic (excluding genital procedures that i don't undertand if that make change in hormones)