Civ VII has the same Start Bias = No Bias problem that both Civ V and Civ VI had, made worse by the fact that the game seems to only consider the Leader's Start Bias, not the Civ's.
That means a great many starts will be in Tundra, because that seems to be the Bias for every European Leader, including Charlemagne, Napoleon, Machiavelli, Catherine (the only one completely appropriate) and Ada. In fact, the only way I've found to consistently get a tropical/semi-tropical start appropriate if playing Maurya or Khmer is to play as Trung Trac. As in the previous two Civs, I find myself restarting on average of 3 - 7 times to get what I consider an appropriate starting terrain for the Leader- Civ combination I'm trying to play.
Not to say you cannot play a perfectly enjoyable game with Egypt or Greece in the Tundra, but I personally cannot stand it and have been putting up with the same start bias problem for over 10 years now.
Until they allow us to pick the terrain or at least the terrain bias ('Tropical', 'Desert', 'Tundra', etc) for our maps I nsuspect I will siply continue to waste a lot of time restarting before every game . . .