When you can’t tell exactly where an item is located, open the Navigator (press the small compass icon at the right side of the window). The navigator shows all “objects” sorted by categories.
In your case, the “lost” object may be in Text frames, OLE objects or Drawing objects.
Double clicking on a name selects the object and scroll the view on it. It is now selected. A contextual menu pops up when you right-click the selection.
To show the community your question has been answered, click the ✓ next to the correct answer, and “upvote” by clicking on the ^ arrow of any helpful answers. These are the mechanisms for communicating the quality of the Q&A on this site. Thanks!