If you find that the customization option on the UG module homepage disappears, it may be for the following reasons.

1. System update: If the UG module is upgraded to a new version, there may be some changes, including customization options on the home page. You can check the new version of the document for changes.

2. Permission problem: If the account does not have sufficient permissions, the custom options may disappear. Please contact the administrator for higher rights.

3. Personal Settings: If the customization option is turned off in personal settings, it will also disappear on the home page. You can check your personal settings and re-enable the customization options.