If you open SketchUp 2023 and choose an empty new file to be created, then the SketchUp model is created witht the component “Heather”.
If now you edit Heather, delete face (for instance her shirt) and exit the edit mode, then a dialog box pops up (in the bottom right corner of the screen) asking if you want to save the changes made in Heather or not.
Let me know if this does not happen on your SketchUp instance. Then I can produce a small animated gif.