RIght. and whiplash got implemented as a knock in cata, and lasted until it was removed. If they still had it in legion (I only played briefly and never bothered trying my lock.) that means it was removed in BFA prepatch.
You were listing succubus knock as a counter to shadowy duel when it doesn’t exist \ hasn’t existed for 2 years. Which is why i went to the trouble of explaining that it’d been removed.
Can demo still summon advanced versions of the baseline pets? they might still have the ‘stronger’ versions of the spells.