On Friday, Musk vowed "significant reinforcement of content moderation and protection of freedom of speech" in a meeting with France President Emmanuel Macron.
She said layoffs did not significantly impact full-time employees or contractors working on what the company referred to as its "Health" divisions, including in "critical areas" like child safety and content moderation.
She added that the number of people working on child safety had not changed since the acquisition, and that the product manager for the team was still there.
On child safety, for instance, Irwin said Twitter had shifted toward automatically taking down tweets reported by trusted figures with a track record of accurately flagging harmful posts.
In the interview on Thursday, Irwin said Twitter took down about 44,000 accounts involved in child safety violations, in collaboration with cybersecurity group Ghost Data.