NVD 1992 height - EPSG:9681

WKT

VERTCS["NVD_1992_height", 
	VDATUM["National_Vertical_Datum_1992"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["NVD_1992_height", 
	VDATUM["National_Vertical_Datum_1992"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "9681"]]

Data from @esri/proj-codes

{
  "wkid": 9681,
  "latestWkid": 9681,
  "macro": "PE_VCS_NVD_1992_HEIGHT",
  "name": "NVD_1992_height",
  "wkt": "VERTCS[\"NVD_1992_height\",VDATUM[\"National_Vertical_Datum_1992\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"NVD_1992_height\",VDATUM[\"National_Vertical_Datum_1992\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"9681\"]]",
  "description": "NVD 1992 height",
  "authority": "EPSG",
  "version": "10.009(12.9.0)",
  "deprecated": "no",
  "areaname": "Bangladesh - onshore",
  "extent": {
    "slat": 20.52,
    "nlat": 26.64,
    "llon": 88.01,
    "rlon": 92.67
  }
}