Hi Larry,
The nature of the Sheetmetal module is to create operational paths for a modern CNC metalworker and not closing die-set operations. [As I started out as a Tool & Die machinist making (among other things) compound, progressive, and compound-progressive die-sets, it is still a "mindset" that leads me into design traps.] A part with the dimple you have laid out is going to have to be made on some type of closing die-set as otherwise the "dimple" would collapse during the fold (bend) operation.
Somebody else may know a "trick" around this, but the above is my take on things...