Difference between to become and to come true in Korean
되다·이루어지다

되다to become
The word "되다" means "to become" or "to turn into." You use it when someone or something changes into a new state, time, job, or condition. It is very common in everyday Korean, like becoming a student, becoming evening, or becoming cheaper.

이루어지다to come true
이루어지다 means that a dream, wish, or hope becomes real. In English, we often say “come true.” Use it when something you wanted or waited for finally happens.
The difference
되다 is a broad word for becoming or turning into something. 이루어지다 is specifically for a dream, plan, wish, or hope becoming real.