Thassilonian Specialist not supported it would seems

Having successfully merged the trickster with the magus spellbook and wanted to try the Thassilonian specialist it didn't have the option to merge so messing with toybox and checking the lich one have an entry in allowed spellbook for each of the Thassilonian's choice but the trickster one's don't have them, so I guess It will be added in the futur?