Necromancy?

[MikkoAkure]

Necromancy is frowned upon in Japan culturally and outright banned in China. As others have said, any reference to necromancy in FF has been in the form of a "voidmagic blue mage of sorts, not raising the dead. By all accounts, FF necromancer = Thaumaturge

TLDR it ain't happening

Palace of the Dead is straight up about a necromancer lich coming from another Square property (Tactics Ogre) and raising the dead. The lorebook also outright mentions necromancy and that ashkin arise through any means of outside magic, not necessarily just voidsent.

Plus if it was banned in China, then Blizzard (partly owned by Tencent) wouldn't have brought the necromancer back for Diablo 3.