Hi ATT-Team,
there might be a small bug regarding a zone drop in Maldraxxus. The item "Simple Tome of Bone-Binding" (hunter ability to tame undead pets) is shown as not dropped:

However, I already have the ability to tame pets (I only have a single hunter on this account in Shadowlands). I did skip the quests and did choose "Threads of Fate".

A better check for this item would be to check for completion of quest 62255 as this is the effect of the dropped tome.
(see https://www.wowhead.com/spell=340825/simple-tome-of-bone-binding)

With that in mind, you can see that it's already completed:

Kind regards,
Loradim