AVWS height - EPSG:9458

WKT

VERTCS["AVWS_height", 
	VDATUM["Australian_Vertical_Working_Surface"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["AVWS_height", 
	VDATUM["Australian_Vertical_Working_Surface"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "9458"]]

Data from @esri/proj-codes

{
  "wkid": 9458,
  "latestWkid": 9458,
  "macro": "PE_VCS_AVWS_HEIGHT",
  "name": "AVWS_height",
  "wkt": "VERTCS[\"AVWS_height\",VDATUM[\"Australian_Vertical_Working_Surface\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"AVWS_height\",VDATUM[\"Australian_Vertical_Working_Surface\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"9458\"]]",
  "description": "AVWS height",
  "authority": "EPSG",
  "version": "9.9(12.9.0)",
  "deprecated": "no",
  "areaname": "Australia - GDA",
  "extent": {
    "slat": -60.55,
    "nlat": -8.47,
    "llon": 93.41,
    "rlon": 173.34
  }
}