だがな

but

→ だ
phrase Uncommon #17,966
but だが means “but” or “however.” The sentence-ending な adds a casual, reflective tone and can express regret, like “though” in English.
JA: そうしたいのだがな。
EN: I’d like to do that, though.

だがな

But...

— Godzilla Minus One (2023)

じいさん長いつきあいだがな

Old man, we've known each other a long time.

— 紅の豚 (1992)

と言っても俺だけだがな

Though, it’s just me.

— 続・夕陽のガンマン (1966)

だがな一度はついた勝負だ

But the match has already been decided once.

— 紅の豚 (1992)