We have the same issue with Akkhan’s 2-piece bonus. Look at the explanation for how to get the toughness to appear on sheet, (equip unequip equip):
~ Laws of Valor Unstoppable Force Does Not Buff Capt Crimson - #5 by dmkt-1267
I’m pretty sure i got this going with Pride’s Fall.
Theoretically, Laws of Valor:Unstoppable Force should be able to boost it another 50%.