Any idea on how to reduce thermal bridges for a single-family residential building in EnergyPlus?

Suppose a layer of insulation (R-10 or 4 inches) is added to the exterior layer of an envelope to make the envelope thermal bridge free or reduce the thermal bridge. Do you think it is going to work?

Please note that the envelope is built based on IECC 2018, so it has a layer of insulation in the first place. Then to reduce thermal bridges to follow PHIUS standards, I'm adding an extra insulation layer to the exterior layer.