만 되면

if just …; as long as …

→ 만
phrase Uncommon #14,517
if just …; as long as … 만 adds the sense of “just” or “only”; 되면 means “if it is” or “if it works out.” The exact meaning depends on what comes before it.
KO: 시간만 되면 같이 갈게요.
EN: If I have time, I’ll go with you.

시투, 리투 다시 올 거 야 아빠 취직만 되면 야

Sito and Rito will come back as soon as Dad gets a job.

— No Other Choice (2025)

개도 닷새만 되면 주인을 안다.

Even a dog knows its owner after five days.