France - mainland - EPSG:7400

WKT

HVCOORDSYS["HVC_NTF_Paris_and_NGF_IGN69_Height", 
	GEOGCS["GCS_NTF_Paris", 
		DATUM["D_NTF", 
			SPHEROID["Clarke_1880_IGN", 6378249.2, 293.4660212936265]], 
		PRIMEM["Paris", 2.337229166666667], 
		UNIT["Grad", 0.01570796326794897]], 
	VERTCS["NGF_IGN69", 
		VDATUM["Nivellement_General_de_la_France_IGN69"], 
		PARAMETER["Vertical_Shift", 0.0], 
		PARAMETER["Direction", 1.0], 
		UNIT["Meter", 1.0]]]

WKT2

COMPOUNDCRS["HVC_NTF_Paris_and_NGF_IGN69_Height", 
	GEOGCRS["GCS_NTF_Paris", 
		DATUM["D_NTF", 
			ELLIPSOID["Clarke_1880_IGN", 6378249.2, 293.4660212936265]], 
		PRIMEM["Paris", 2.337229166666667, 
			ANGLEUNIT["Degree", 0.0174532925199433]], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Grad", 0.01570796326794897]], 
	VERTCRS["NGF_IGN69", 
		VDATUM["Nivellement_General_de_la_France_IGN69"], 
		CS[vertical, 1], 
		AXIS["Gravity-related height (H)", up, 
			LENGTHUNIT["Meter", 1.0]]], 
	ID["EPSG", "7400"]]

Data from @esri/proj-codes

{
  "wkid": 7400,
  "latestWkid": 7400,
  "pcsWkid": 0,
  "gcsWkid": 4807,
  "vcsWkid": 5720,
  "macro": "PE_HVC_NTF_PARIS_AND_NGF_IGN69_HEIGHT",
  "name": "HVC_NTF_Paris_and_NGF_IGN69_Height",
  "wkt": "HVCOORDSYS[\"HVC_NTF_Paris_and_NGF_IGN69_Height\",GEOGCS[\"GCS_NTF_Paris\",DATUM[\"D_NTF\",SPHEROID[\"Clarke_1880_IGN\",6378249.2,293.4660212936265]],PRIMEM[\"Paris\",2.337229166666667],UNIT[\"Grad\",0.01570796326794897]],VERTCS[\"NGF_IGN69\",VDATUM[\"Nivellement_General_de_la_France_IGN69\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]]",
  "wkt2": "COMPOUNDCRS[\"HVC_NTF_Paris_and_NGF_IGN69_Height\",GEOGCRS[\"GCS_NTF_Paris\",DATUM[\"D_NTF\",ELLIPSOID[\"Clarke_1880_IGN\",6378249.2,293.4660212936265]],PRIMEM[\"Paris\",2.337229166666667,ANGLEUNIT[\"Degree\",0.0174532925199433]],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Grad\",0.01570796326794897]],VERTCRS[\"NGF_IGN69\",VDATUM[\"Nivellement_General_de_la_France_IGN69\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]]],ID[\"EPSG\",\"7400\"]]",
  "description": "France - mainland",
  "authority": "EPSG",
  "version": "6.15(10.0.0)",
  "deprecated": "no",
  "areaname": "France - mainland onshore",
  "extent": {
    "slat": 42.33,
    "nlat": 51.14,
    "llon": -4.87,
    "rlon": 8.23
  }
}