satellite measurements put the Greenland Ice Sheet and the Antarctic Ice Sheets as getting thicker, not thinner. The added thickness means that the glaciation flows into the oceans are happening faster. So, things like ice shelves which are floating anyway are breaking off faster. Floating Ice melting does nothing to overall sea levels.
The satellite observations of large melt water lakes in Greenland are interesting, as such occurrences have only been rarely observed, are interesting, but, are not necessarily signs of the collapse of the Greenland Ice Sheets