Plesk bug #PPPM-9897 that is planned to be fixed in future product updates.
Until a fix becomes available, it is possible to create a custom button for watchdog: this way it will be available for search.
- Log into Plesk.
- Navigate to Tools & Settings > Custom Buttons.
- Paste the '
/plesk/modules/watchdog/service@/' link to the URL field and give a name to the button, and select the location (for example, Administrator's Tools & Settings page)
- Apply the changes.
Now Watchdog is available as custom button in Tools & Settings and can be found in search.