Before the WordPress 6.5 update, Reusable Block titles could be edited without any plug-in. After the 6.5 update, the ability to edit titles disappears from the Reusable Block. I don’t know why a useful and necessary feature was removed.
Bluehost’s official special inspection found that the background database did not read the picture of the website icon, and it was determined that it was caused by a bug in the theme.