There is no imminent danger of island countries or shorelines being inundated that are not otherwise subsiding.
Please don't take this as being argumentative. Corrections you have made are noted. I have found nothing to fault with any of your commentary, except it would appear that some things are already being impacted by rising sea levels.
In particular is seawater intrusion into low lying areas killing off large areas of forest, as in this report (1) about the east coast of the U.S., but is reported occurring around the world.
Also, some low lying coastal areas and islands are rapidly becoming uninhabitable due to higher high tides (King Tides) which now flood previously dry land. This is also occurring in south New Jersey coastal areas.
And then there are the Marshall islands (2).
They are constantly being harassed by flooding seas. One of the reasons is taken from (2) :
"Changing global trade winds have raised sea levels in the South Pacific about a foot over the past 30 years, faster than elsewhere. Scientists are studying whether those changing trade winds have anything to do with climate change."
Many of these islands are rapidly becoming uninhabitable, with continuous flooding disrupting homes, sewage, etc.. It is certain many other small, low lying island nations are experiencing similar problems.
When I first quizzed you on the carbon remediation, was hoping we could pull something off. But the numbers you present are devastating in their magnitude. Unless someone comes up with a unique and brilliant solution for carbon remediation, this is going to be nasty. In truth, it was always my suspicion that it is too late to do anything about it. Guess I was hoping you had some ideas about rabbits pulled out of hats.
Sadly, the evidence does indicate the problems have already begun.
1.
https://www.nytimes.com/interactive/2019/10/08/climate/ghost-forests.html
2.
https://www.nytimes.com/interactive/2015/12/02/world/The-Marshall-Islands-Are-Disappearing.html