Where is there any raising sea level, I have yet to hear of an island or pictures of a flooded island because of rising sea water. It hasn’t happened.
Random example chosen.
If you are in Santa Monica, CA you will have to wait a whole century to see a 6 inch rise...:^)
https://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?id=9410840