Difference between to come and to come true in Korean
오다·이루어지다

오다to come
The word (오다) means to come. Use it when someone or something moves toward you or arrives at a place. It is also used in everyday expressions like talking about people coming, buses coming, or rain coming.

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
오다 means a person or thing comes to a place or time arrives. It does not mean a wish or dream comes true in Korean.