When ice melts, the water level drops. The only exception is when inland ice melts.
The classic experiment with ice cubes and water in a measuring cup, observing the liquid level and then letting it melt and observing it again, shows that floating ice is a net nothing to water level.
True, melted inland ice can add to ocean and waterway levels. There’s a lot of inland ice in such places as Antarctica and northern Canada. But it would take a LOT of warming to get the ice of regions that are well below the freezing point, to release itself.
In the meantime, if the AIR warms, it will pick up and hold more net water vapor. Some marginal desert areas may become arable that way.
Maybe God knew what He was doing after all when He invented water and all the rest of it. Because things are imperfect in this mortal coil doesn’t necessarily mean everything’s doomed to go to hell ahead of schedule.
A basic law of nature that these scientist cannot get their heads around. Sure must be some smart SOBs.