As previously communicated, as of May 8, 2025, Sitecore has deprecated the legacy XM Cloud rich text editor, and made the newer CKEditor rich text editor the default.
If you’re already using JSS 21.5.2 or later, and you had already enabled CKEditor, no further action is needed and no changes in behavior is expected for the environments where the new editor was enabled.
If you had not upgraded all your XM Cloud environments to at least version 21.5.2 of JSS, or if you had not yet enabled CKEditor, you may notice that the experience of editing rich text or multiline fields has changed. However, content on your live sites won't be affected. To enable editing rich text components, upgrade all your XM Cloud environments to JSS version 21.5.2 or higher and benefit from the many additional formatting options of CKEditor, the ability to create tables, find and replace text, apply various image styling options, as well as the support of custom markup.