수 있게 되어서

having become able to

→ 수
phrase Rare #20,487
having become able to Used after a verb to describe gaining the ability or opportunity to do something; 되어서 can also express a reason, as in “because I’ve become able to.”
KO: 한국어를 읽을 수 있게 되어서 기뻐요.
EN: I'm happy that I've become able to read Korean.