A lot of the post glacial sea level rise has been balanced by gradual uplift along coastal areas that were within the glacial footprint, or were in the footprint of glacial meltwaters.
Weve been monitoring several thousand sea level change areas in the US and of these, few are really seeing any measurable rise. Much of the areas , like the end of the Mississippe Delta, are merely "starved" for sediment .
We've done all sorts of techy flood control things to assist marine transport and agriculture , but many times the beneficial effects are only temporary and often have long term negative costs.