The Bay of Fundy is in no way analogous to a large land mass surrounded by water.
The tides in the Bay of Fundy are unique and due to unique conditions. The time it takes for a wave to travel from the mouth of the bay to the end and back is almost exactly the same as the time between high tides. This sets up a resonance that causes the extremely high tides.
That resonance would not exist in your fludde scenario because the geometry is totally different.
That resonance is periodic, meaning that what goes into the bay must shortly come out of the bay before any more goes into the bay. There cannot be a steady rise in the Bay of Fundy or any analogous situation.
Tidal Resonance in the Bay of Fundy and Gulf of Maine
Edited by JonF, : No reason given.