Correct, it’s in addition to the bonus from Troops, and it’s not shown in the displayed stats.
As a community we long ago determined the existence of the undisplayed Attack boost by observing DoT amounts on Defense vs. Offense, and determined the existence of the Defense boost by reverse engineering how damage calculation works.
This is the thread that originated the foundational analysis about the undisplayed 20% Defense bonus:
@Gryphonknight did a nice job summarizing the Defense bonus a bit here too: [Primer] Defense AI Cheats or why computer gets first move, trickle mana & bonus damage and how to exploit/ defend against it for more trophies
And here’s some info about the unlisted 20% Attack bonus: Understanding DoT (Damage over Time) - #12 by zephyr1