GLMSL(2023) depth - EPSG:10649

WKT

VERTCS["GLMSL(2023)_depth", 
	VDATUM["Greenland_Mean_Sea_Level_(2023)"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", -1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["GLMSL(2023)_depth", 
	VDATUM["Greenland_Mean_Sea_Level_(2023)"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", down, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "10649"]]

Data from @esri/proj-codes

{
  "wkid": 10649,
  "latestWkid": 10649,
  "macro": "PE_VCS_GLMSL_2023_DEPTH",
  "name": "GLMSL(2023)_depth",
  "wkt": "VERTCS[\"GLMSL(2023)_depth\",VDATUM[\"Greenland_Mean_Sea_Level_(2023)\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",-1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"GLMSL(2023)_depth\",VDATUM[\"Greenland_Mean_Sea_Level_(2023)\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",down,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"10649\"]]",
  "description": "GLMSL(2023) depth",
  "authority": "EPSG",
  "version": "11.013(13.4.0)",
  "deprecated": "no",
  "areaname": "Greenland - offshore",
  "extent": {
    "slat": 56.38,
    "nlat": 87.03,
    "llon": -75,
    "rlon": 7.99
  }
}