I found it unworthy of a place in the UI components Drawer.
Maybe under Notifiers for special cases.
It's like an uninformative Progress Notifier that needs to be inserted somewhere onscreen (I imagine squirrelled away next to a tab label like in a browser tab) that you make .Visible before asking for a Web request then hide after getting a result back.
All it does is endlessly spin when visible, without the grace to let you see behind it.
For LinearProgress, would it be better to have one Color property setter instead of IndeterminateColor and ProgressColor? It would be more user-friendly IMO.