It’s probably more due to coastal subsidence than rising sea levels. My favorite is when glaciers retreat there is a rebound effect from pressure which can cause other local land to sink as a sort of equilibrium.
I think in the Mediterranean coastal subsidence is mostly due to plate tectonics. I remember reading something about how myth of Atlantis might be due to a real life city that sunk as a result of an earthquake.
https://en.m.wikipedia.org/wiki/Zanclean_flood
Is always fun to talk about when looking at the geology of the Mediterranean.
Why are there mediterranean archeological sites about 2000 years old in 30 feet of water a kilometer or so off the current coastlines?