RGAF09 (lon-lat) - ESRI:115916

WKT

VERTCS["RGAF09_(lon-lat)", 
	DATUM["Reseau_Geodesique_des_Antilles_Francaises_2009", 
		SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["RGAF09_(lon-lat)", 
	DATUM["Reseau_Geodesique_des_Antilles_Francaises_2009", 
		ELLIPSOID["GRS_1980", 6378137.0, 298.257222101]], 
	CS[vertical, 1], 
	AXIS["Ellipsoidal height (h)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["Esri", "115916"]]

Data from @esri/proj-codes

{
  "wkid": 115916,
  "latestWkid": 115916,
  "macro": "PE_VCS_RGAF09_LON_LAT",
  "name": "RGAF09_(lon-lat)",
  "wkt": "VERTCS[\"RGAF09_(lon-lat)\",DATUM[\"Reseau_Geodesique_des_Antilles_Francaises_2009\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"RGAF09_(lon-lat)\",DATUM[\"Reseau_Geodesique_des_Antilles_Francaises_2009\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101]],CS[vertical,1],AXIS[\"Ellipsoidal height (h)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"Esri\",\"115916\"]]",
  "description": "RGAF09 (lon-lat)",
  "authority": "Esri",
  "version": "13.2.0",
  "deprecated": "no",
  "areaname": "Caribbean - French Antilles",
  "extent": {
    "slat": 14.08,
    "nlat": 18.54,
    "llon": -63.66,
    "rlon": -57.52
  }
}