MVGC height - EPSG:8841

WKT

VERTCS["MVGC_height", 
	VDATUM["MOMRA_Vertical_Geodetic_Control"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["MVGC_height", 
	VDATUM["MOMRA_Vertical_Geodetic_Control"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "8841"]]

Data from @esri/proj-codes

{
  "wkid": 8841,
  "latestWkid": 8841,
  "macro": "PE_VCS_MVGC_HT",
  "name": "MVGC_height",
  "wkt": "VERTCS[\"MVGC_height\",VDATUM[\"MOMRA_Vertical_Geodetic_Control\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"MVGC_height\",VDATUM[\"MOMRA_Vertical_Geodetic_Control\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"8841\"]]",
  "description": "MVGC height",
  "authority": "EPSG",
  "version": "9.5(10.8.0)",
  "deprecated": "no",
  "areaname": "Saudi Arabia - onshore",
  "extent": {
    "slat": 16.37,
    "nlat": 32.16,
    "llon": 34.51,
    "rlon": 55.67
  }
}