Chosen Solution

I have an iPhone SE that the camera flash doesn’t work on. Is it possible to replace the camera flash on it, and if so, what parts would I need?

Though accurate in your answer @avanteguarde i think they meant the camera flash iPhone SE Volume Controls Replacement iPhone SE (1st Gen) Audio Control and Power Button Cable

Yes it is possible, but financially, it would not be realistic. You would need another working set of iPhone SE flash chips, expensive soldering gear, and really steady hands.