Does someone know more about this? I would simply create a new tag for it (for example minecraft-greek-mythology), but I know absolutely nothing about this game, so I wouldn't know what to write into the tag wiki.
Minecraft Greek Mythology is a so called Mashup Pack:
A mashup pack is a combination of Skin Pack, Texture Pack, and a Map all rolled up into one. These have been common on Minecraft Console Edition for years now. source
In this case, it contains "Greek gods, fantastical creatures and epic locations", " a bespoke texture set and themed UI" and an "orchestral soundtrack".
Basically, it seems to be a DLC with an emphasis on appearance.
It's currently also available for the Pocket and Windows 10 editions. source
As it doesn't seem to change core elements, a retag might not be necessary (but I'm not very familiar with the do's and don'ts of tagging yet).
There are many resource packs available to download from the Minecraft marketplace. You can download character skins, texture packs, and maps. The Greek Mythology pack contains all three.
When you apply a texture pack to your world, everything looks different but still behaves the same. The person asking the question simply wants to know what texture the zombie villagers have when the Greek Mythology texture pack is applied. The behavior of a zombie and a zombie villager is the same, so if you don't know the difference between the textures you would have to use trial and error to figure out which is which, which can be annoying for what the poster is trying to do.
This is still Minecraft Bedrock edition and it doesn't need a new tag.