EVRF2007-PL height - EPSG:9651

WKT

VERTCS["EVRF_2007_PL_height", 
	VDATUM["European_Vertical_Reference_Frame_2007_Poland"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["EVRF_2007_PL_height", 
	VDATUM["European_Vertical_Reference_Frame_2007_Poland"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "9651"]]

Data from @esri/proj-codes

{
  "wkid": 9651,
  "latestWkid": 9651,
  "macro": "PE_VCS_EVRF_2007_PL_HT",
  "name": "EVRF_2007_PL_height",
  "wkt": "VERTCS[\"EVRF_2007_PL_height\",VDATUM[\"European_Vertical_Reference_Frame_2007_Poland\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"EVRF_2007_PL_height\",VDATUM[\"European_Vertical_Reference_Frame_2007_Poland\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"9651\"]]",
  "description": "EVRF2007-PL height",
  "authority": "EPSG",
  "version": "10.016(12.9.0)",
  "deprecated": "no",
  "areaname": "Poland - onshore",
  "extent": {
    "slat": 49,
    "nlat": 54.89,
    "llon": 14.14,
    "rlon": 24.15
  }
}