I don’t understand this map, I live very close to the coast and am 20+ feet above sea level. 5 meters is 16’ 4.85".
The highest point in Pinellas county is 110’, for those who don’t know, it’s the peninsula on West Coast of Florida.
I’m not under the impression there will be a consistent land mass, but something more resembling new islands, keys and beach fronts makes more sense than showing areas entirely underwater.