Is it possible to get all thaumcraft 6 ResearchKey's printed to the CraftTweaker log?

Affected Versions (Do not use "latest"):

• Minecraft: 1.12
• Crafttweaker: 4.1.20
• ModTweaker: 4.0.17
• MTLib: 3.0.6

That was what i was looking for

IT should be included in the /ct thaumcraftDump command
https://docs.blamejared.com/1.12/en/#Mods/Modtweaker/Thaumcraft/Commands/#thaumcraftdump

It is for Infusion and Crucible but not for ArcaneWorkbench

Have you checked the commands provided by thaumcraft then?
/thaumcraft research list or something..?