How easy is vegan travel in Sri Lanka and how do I handle the spice

Sri Lanka is genuinely one of the easiest places in the world to be vegan. A traditional rice and curry spread is mostly plant-based by default: dhal, jackfruit curry, gotu kola sambol, beetroot, pumpkin, all cooked in coconut milk. Just say "no Maldive fish" and "no egg", since dried fish flakes sometimes sneak into sambols. For spice, the polite phrase is "miris adui" (less chili) or just "not spicy, please" with a smile. No cook is offended; they adjust happily and will often bring extra chili on the side for others.