RGPF 3D - EPSG:4999

WKT

GEOGCS["RGPF_3D", 
	DATUM["D_Reseau_Geodesique_de_la_Polynesie_Francaise", 
		SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433], 
	LINUNIT["Meter", 1.0]]

WKT2

GEOGCRS["RGPF_3D", 
	DATUM["D_Reseau_Geodesique_de_la_Polynesie_Francaise", 
		ELLIPSOID["GRS_1980", 6378137.0, 298.257222101]], 
	PRIMEM["Greenwich", 0.0], 
	CS[ellipsoidal, 3], 
	AXIS["Latitude (lat)", north, 
		ORDER[1], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	AXIS["Longitude (lon)", east, 
		ORDER[2], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	AXIS["Ellipsoidal height (h)", up, 
		ORDER[3], 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "4999"]]

Data from @esri/proj-codes

{
  "wkid": 4999,
  "latestWkid": 4999,
  "macro": "PE_GCS_RGPF_3D",
  "name": "RGPF_3D",
  "wkt": "GEOGCS[\"RGPF_3D\",DATUM[\"D_Reseau_Geodesique_de_la_Polynesie_Francaise\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433],LINUNIT[\"Meter\",1.0]]",
  "wkt2": "GEOGCRS[\"RGPF_3D\",DATUM[\"D_Reseau_Geodesique_de_la_Polynesie_Francaise\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,3],AXIS[\"Latitude (lat)\",north,ORDER[1],ANGLEUNIT[\"Degree\",0.0174532925199433]],AXIS[\"Longitude (lon)\",east,ORDER[2],ANGLEUNIT[\"Degree\",0.0174532925199433]],AXIS[\"Ellipsoidal height (h)\",up,ORDER[3],LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"4999\"]]",
  "description": "RGPF 3D",
  "authority": "EPSG",
  "version": "6.14(12.7.0)",
  "deprecated": "no",
  "areaname": "French Polynesia",
  "extent": {
    "slat": -31.24,
    "nlat": -4.52,
    "llon": -158.13,
    "rlon": -131.97
  }
}