じゃないけど

not ..., but

→ だ
phrase Uncommon #14,771
not ..., but A casual way to soften a contrast, correction, or disagreement. When left at the end of a sentence, けど can imply an unfinished thought or soften what was just said.
JA: 嫌いじゃないけど、毎日は食べたくない。
EN: I don't dislike it, but I wouldn't want to eat it every day.

正確には友達じゃないけどとは

What do you mean by “not exactly friends”?

— 映画 聲の形 (2016)

みんなじゃないけど

Not everyone, though.

— ワンス・アポン・ア・タイム・イン・ハリウッド (2019)

私はゲイじゃないけど私の彼はゲイだよ

I'm not gay, but my boyfriend is.

あまり良い部屋じゃないけど子供たちが喜ぶわ

It’s not a very nice room, but the kids will be happy.

— ダイ・ハード (1988)

嫌いじゃないけど一緒に行こう

I don't dislike it, but let's go together.

— 恋する惑星 (1994)

大したものじゃないけどアントワープお土産だよ

It’s nothing special, but it’s a souvenir from Antwerp.

僕のフランス語は完璧じゃないけどコミュニケーションは十分取れる

My French isn't perfect, but it's good enough to communicate.

トムのこと嫌いじゃないけど好きでもない

I don't dislike Tom, but I don't like him either.