The rate of sea level rise has been slowing for thousands of years.
There has been no acceleration of sea level rise in the past 150 years due to CO2 / global warming.
Here is one example of a very old Manhattan tide gauge -- data provided by the Obama Administration's NOAA:
https://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?stnid=8518750
And here's a chart from Sydney, Australia:
