[GaltAdonis]

But the amount of glaciers that extend out over the oceans will melt and
displace less volume that the glacier did because ice take up more
volume than the water. That was my point. But this applies only to the
ice support (floating on) water. The ice sitting on land becomes meltwater
that will raise ocean levels. So whether we all drown eventually
depends of which ice where melts more.
Or something like that. Water expands when it freezes, ya know…

[NorthMountain]

glaciers that extend out over the oceans will melt and displace less volume that the glacier did because ice take up more volume than the water.

Ice does indeed take up more volume than liquid water. That's why it floats, and some of it extends above the water surface. However, as it melts, it loses volume. The liquid level is unchanged when floating ice melts. This phenomenon is easily verified in your kitchen.