The G29 Auto_Bed_Leveling is independent from whether you are running on a Delta or not. The G28 command makes an 'identity' correction matrix (1's running down the diagonal) that it multiplies against any future coordinate it gets. The G29 command just warms over that correction matrix so it reflects what is really going on with the bed. If you turn on both Delta support and Auto_Bed_Leveling, you should have what you want.

Unfortunately, I don't have a Delta printer so I can't verify that.