I dont want to be that guy - but really is that all?

Did you browse a little bit? Half of Florida is gone. That is a migration of 10 million people just for one US State.

Yes I did - I zoomed out and looked all over the world.

6M is a dramatic increase in sea level I would have expected huge areas of land mass to be gone globally and that source suggests a fraction of a percentage point of land mass lost globally.