@kavbiswa I have checked the "CKEditor Accordion" module with Drupal 10.0.1, ...

@kavbiswa I have checked the "CKEditor Accordion" module with Drupal 10.0.1, Claro as the admin theme, and Olivero as the Frontend theme but I cannot reproduce the issue. By seeing the image on #2, maybe you are using some other theme from the frontend side.

Please see the attached screenshot, with the above configuration.