https://www.theguardian.com/technology/2022/apr/06/twitter-working-on-edit-button-but-says-idea-did-not-come-from-elon-musk

Social media company says it has been working on edit button since 2021 and will be tested on people signed up for Twitter Blue

Twitter has confirmed it has working on an edit button, but denied the idea came after the company’s new largest shareholder, Elon Musk, held a poll on it.