のお手伝いを

help with

→ の
phrase Rare #26,242
help with Usually followed by する, as in 〜のお手伝いをする, meaning “to help with 〜” or “to assist 〜.” The の marks what or whom the help is for; お手伝い is a polite form of 手伝い.
JA: 宿題のお手伝いをしましょうか。
EN: Shall I help you with your homework?

台所でママのお手伝いをしたの

I helped Mom in the kitchen.

捜査のお手伝いを不明ナンバー情報別の所にもあります

Information on unknown numbers is also available elsewhere to help with the investigation.

— ブレードランナー 2049 (2017)