Who can view the Tracket widgets depends on their access on the monday.com dashboards. Anyone who has access to the dashboard, can see the data that is shared by the widget's creator.
Tracket widgets are not supported on a shareable view.
Everyone in your monday.com instance is able to create a widget. The data they can display however depends on their rights in Tracket. While a monday.com admin can use all data, a regular member will only be able to use their own logged time; a user can create a widget using the data they have access to.
When a widget with certain data is shared on a dashboard, anyone with access to this dashboard will be able to see this same data.
Only the creator of a widget and monday.com admins can edit widgets. Always save your changes before closing the widget!