Grand Comoros - EPSG:4646

WKT

GEOGCS["GCS_Grand_Comoros", 
	DATUM["D_Grand_Comoros", 
		SPHEROID["International_1924", 6378388.0, 297.0]], 
	PRIMEM["Greenwich", 0.0], 
	UNIT["Degree", 0.0174532925199433]]

WKT2

GEOGCRS["GCS_Grand_Comoros", 
	DATUM["D_Grand_Comoros", 
		ELLIPSOID["International_1924", 6378388.0, 297.0]], 
	PRIMEM["Greenwich", 0.0], 
	CS[ellipsoidal, 2], 
	AXIS["Latitude (lat)", north, 
		ORDER[1]], 
	AXIS["Longitude (lon)", east, 
		ORDER[2]], 
	ANGLEUNIT["Degree", 0.0174532925199433], 
	ID["EPSG", "4646"]]

Data from @esri/proj-codes

{
  "wkid": 4646,
  "latestWkid": 4646,
  "macro": "PE_GCS_GRAND_COMOROS",
  "name": "GCS_Grand_Comoros",
  "wkt": "GEOGCS[\"GCS_Grand_Comoros\",DATUM[\"D_Grand_Comoros\",SPHEROID[\"International_1924\",6378388.0,297.0]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]]",
  "wkt2": "GEOGCRS[\"GCS_Grand_Comoros\",DATUM[\"D_Grand_Comoros\",ELLIPSOID[\"International_1924\",6378388.0,297.0]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433],ID[\"EPSG\",\"4646\"]]",
  "description": "Grand Comoros",
  "authority": "EPSG",
  "version": "6.5(9.0.0)",
  "deprecated": "no",
  "areaname": "Comoros - Njazidja (Grande Comore)",
  "extent": {
    "slat": -11.99,
    "nlat": -11.31,
    "llon": 43.16,
    "rlon": 43.55
  }
}