Bangladesh had a GDP per capita of $1855 in 2019, higher than the Netherlands' $1835 in 1966 (measured in current US dollars) https://data.worldbank.org/indicator/NY.GDP.PCAP.CD?location...

Naively using GDP per capita as a measure of the average level of technology people can afford, this suggests that Bangladesh should be able to employ land reclamation measures similar to the Netherlands in the 1960s, like https://en.wikipedia.org/wiki/Flevopolder

There might be other considerations (such as differing geography) that make this impracticable, however.

so far the coral atols are growing in tandem with the sea level, so sea level rise cannot be the reason for people there leaving. https://www.downtoearth.org.in/news/climate-change/how-to-fa...

The existing infrastructure doesn't grow higher, and the increased climate variability means much more floods.

That's not how sea levels work.

I suspect the Maldives are going to be doing a lot more dredging in the next few years.