になっていない

has not become; is not

→ に
phrase Rare #20,802
has not become; is not Expresses that something has not reached a certain state or condition, or is not currently in that state. It can often be translated as “not yet” depending on context.
JA: 部屋はまだきれいになっていない。
EN: The room isn't clean yet.

彼女のは、まだ文章になっていない

Hers still isn't in sentence form.

その場以前ほどきれいになっていないようなのだ

It seems that place isn't as clean as it used to be.

あなたの答えは答えになっていない

Your answer doesn't answer the question.

中国影響がなければ日本文化は今日の姿になっていないだろう

Without Chinese influence, Japanese culture would not be what it is today.

その垂直になっていない

That pillar isn't vertical.

彼女は一人で外国旅行するほどのになっていない

She isn’t old enough to travel abroad alone.

君はまだ運転免許とれるほどの年齢になっていない

You're not old enough to get a driver's license yet.

その事はまだお聞きになっていないかもしれない

You may not have heard about that yet.

彼は両親の世話になっていない

He doesn't rely on his parents.