This is done using the Count To Value settings of your status value, they're used to fade from current to new value. Any HUD displaying them will automatically adjust to the counting values.
To display them only at the end of the battle you'll use Display Conditions in your HUD's setup, e.g. a variable or game state condition that you need to set in your battle end schematics.
Displaying it above the combatants you'll use a Combatant Object type HUD, which displays the HUD based on the combatant's on-screen position. E.g. the 3D action RPG tutorials use such a HUD for the enemy health bars.