LKS-2020 + Latvia 2000 height - EPSG:10839

WKT

HVCOORDSYS["LKS-2020_and_Latvia_2000_height", 
	GEOGCS["LKS-2020", 
		DATUM["Latvian_coordinate_system_2020", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	VERTCS["Latvia_2000_(height)", 
		VDATUM["Latvian_Height_System_2000"], 
		PARAMETER["Vertical_Shift", 0.0], 
		PARAMETER["Direction", 1.0], 
		UNIT["Meter", 1.0]]]

WKT2

COMPOUNDCRS["LKS-2020_and_Latvia_2000_height", 
	GEOGCRS["LKS-2020", 
		DATUM["Latvian_coordinate_system_2020", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	VERTCRS["Latvia_2000_(height)", 
		VDATUM["Latvian_Height_System_2000"], 
		CS[vertical, 1], 
		AXIS["Gravity-related height (H)", up, 
			LENGTHUNIT["Meter", 1.0]]], 
	ID["EPSG", "10839"]]

Data from @esri/proj-codes

{
  "wkid": 10839,
  "latestWkid": 10839,
  "pcsWkid": 0,
  "gcsWkid": 10305,
  "vcsWkid": 7700,
  "macro": "PE_HVC_LKS_2020_LATVIA_2000_HEIGHT",
  "name": "LKS-2020_and_Latvia_2000_height",
  "wkt": "HVCOORDSYS[\"LKS-2020_and_Latvia_2000_height\",GEOGCS[\"LKS-2020\",DATUM[\"Latvian_coordinate_system_2020\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],VERTCS[\"Latvia_2000_(height)\",VDATUM[\"Latvian_Height_System_2000\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]]",
  "wkt2": "COMPOUNDCRS[\"LKS-2020_and_Latvia_2000_height\",GEOGCRS[\"LKS-2020\",DATUM[\"Latvian_coordinate_system_2020\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],VERTCRS[\"Latvia_2000_(height)\",VDATUM[\"Latvian_Height_System_2000\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]]],ID[\"EPSG\",\"10839\"]]",
  "description": "LKS-2020 + Latvia 2000 height",
  "authority": "EPSG",
  "version": "12.007(13.6.0)",
  "deprecated": "no",
  "areaname": "Latvia - onshore",
  "extent": {
    "slat": 55.67,
    "nlat": 58.09,
    "llon": 20.87,
    "rlon": 28.24
  }
}