They were both historically important kingdoms, I have no serious issue with including them, but I have a serious issue with historically important entities like empires that are not represented. They should be priorities.
Some ideas:
Lords of the Far East - Tibetans + Jurchen + Thai
Lords of the Caucasus - Georgians + Armenians
Lords of Africa - Kanem + Congo + Swahili
Lords of India - Ghurids + Dravidians + Bengals
Lords of the Americas - Mapuche + Muisca/Chimu + Iroquois.
Lords of the Balkans - Romanians + Serbs (+Croats)
Lords of Eastern Europe - Bohemians + Poles
All the above can change names.
Or a DLC with Empires:
The Last Empires - Tibetans, Kanem, Ghurids, Jurchen, Chola (Dravidians), Bengals.