Kiunga height - EPSG:7652

WKT

VERTCS["Kiunga_(height)", 
	VDATUM["Kiunga"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["Kiunga_(height)", 
	VDATUM["Kiunga"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "7652"]]

Data from @esri/proj-codes

{
  "wkid": 7652,
  "latestWkid": 7652,
  "macro": "PE_VCS_KIUNGA_HT",
  "name": "Kiunga_(height)",
  "wkt": "VERTCS[\"Kiunga_(height)\",VDATUM[\"Kiunga\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"Kiunga_(height)\",VDATUM[\"Kiunga\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"7652\"]]",
  "description": "Kiunga height",
  "authority": "EPSG",
  "version": "8.8(10.5.0)",
  "deprecated": "no",
  "areaname": "Papua New Guinea - onshore south of 5~S and west of 144~E",
  "extent": {
    "slat": -9.35,
    "nlat": -5,
    "llon": 140.85,
    "rlon": 144.01
  }
}