The current Training Completed and Training Not Completed Reports will provide this information. The issue is that councils must create the report and then manipulate the data in a spreadsheet to separate the units and then e-mail it to the units. It is, of course, point in time and will change as training is updated by the council. This information in statistical form by unit is also available from the MyBSA Training page. MyScouting provides a means to do this following the model, for example, of the ScoutParents Roster. An application that displays this information could be developed with access limited to appropriate unit adult leaders.
Training information should be available in several reports to include: listing by leadershp position and unit who was trained in what year and a way to enter into a "holding status" the training of non-registered leaders. So when non-registered leaders do register, thsy can then be recorded. Better, easier to identify reports will show the need for more training and the need for better promotion to training teams.