Notice that the notion that dinosaurs colonised by oceanic travel is not geoidologically specific (i.e., it makes no assumptions about the shape of the Earth and is compatible with either model). For this reason, its candidacy as a potential result of zetetic study is high. Independent inquiry into its truth or falsehood can, and has, been conducted without specific deference to either geoidolgical paradigm. The same cannot be said of tectonic plate theory.
I challenge the notion that tectonic plate theory is incompatible with FET.
Ok, go on then!
The mechanism of plate tectonics still works on a flat Earth. Divergence and subduction still work regardless of the Earth's shape.
One might worry about what happens beyond the Icewall though. That depends how far the Earth extends beyond it. There are several possibilities.
*The interior heat of the Earth dies down beyond the Icewall, and the barrier of solid rock keeps the plates contained within the Habitable Zone. I like this idea because it is consistent with the notion that there is a giant mountain range around the Habitable Zone, which may have been formed from the collision of the outer plates trying to escape over billions of years. It also provides a mechanism for why the Icewall exists.
*The Earth extends forever beyond the Icewall, in which case there is no issue with containing tectonic plates. I don't like this idea too much.
*As the Earth is being pushed upwards, it gradually flattens out, explaining why the continents have broken apart, though subduction is unnecessary in this model.
In addition, plate tectonics explains the existence of virtually every major geologic feature from mountain ranges to trenches, in addition to why earthquakes happen. There is also an abundance of evidence for plate tectonics, magnetic striations, similar rock formations on different continents, etc.