が来たわ

has come

→ が
phrase Uncommon #17,490
has come が marks the subject, and 来た means “came” or “has come.” Final わ adds a soft, emphatic tone and is traditionally associated with feminine speech, though usage varies by speaker and context.
JA: 待っていた手紙が来たわ。
EN: The letter I was waiting for has arrived.

ボートが来たわジャック

The boat’s here, Jack.

— タイタニック (1997)

リカルドが来たわ

Ricardo's here.

— 甘い生活 (1960)

噂をすればキャシーが来たわ

Speak of the devil—here comes Cathy.

お医者様が来たわ

The doctor has arrived.

— ほんとうのピノッキオ (2019)

ハニークムジャが来たわ

Honey, Kumja is here.

— 親切なクムジャさん (2005)

ほらあなたの乗る電車が来たわ

Look, your train is here.

彼女が来たわ

She's here.

— マレーナ (2000)

タクシーが来たわ

The taxi's here.

— 甘い生活 (1960)

マルチェロタクシーが来たわ

Marcello, the taxi is here.

— 甘い生活 (1960)

ママが来たわ

Mom, the car is here!

— ダーク・プレイス (2015)

さあエルファバさんようやく魔法使いから返事が来たわ

Well, Elphaba, we've finally heard back from the Wizard.

— ウィキッド ふたりの魔女 (2024)