In the featuremanager design tree expand drawing view to show the flat pattern feature.
Solidworks sheet metal drawing show bend lines.
No bend lines or bend notes are show then your bend line sketch for that view is more than likely not set to show.
Go to the view drop down menu or the view heads up menu and select sketches.
Hiding the bend lines also hides the sheet metal bend notes.
Search toggling the visibility of bend lines in the solidworks knowledge base.
Expand the flat pattern feature right click bend lines and select show or hide.
In the drawing view propertymanager you can.
No bend lines but bend notes are show then your sketches are more than likely not set to view.
You can control the precision for sheet metal bend line notes in tools options document properties tables bend.
To unmerge bend notes right click the merged note and click unmerge bend notes.