Huawei MA5800 ONU graph

We would like to graph every OLT on GPON interfaces as an single interface. It seem that everything is already available in HUAWEI-XPON-MIB but not available in observium webUI.

Output of snmpwalk:

HUAWEI-XPON-MIB::hwGponDeviceOntLineProfName.4194362624.1 = STRING: "ratelimit-300M"                                                     
HUAWEI-XPON-MIB::hwGponDeviceOntServiceProfName.4194362624.1 = STRING: "ONT"                                                           
HUAWEI-XPON-MIB::hwGponDeviceOntDespt.4194362624.1 = STRING: "client-1234" 

HUAWEI-XPON-MIB::hwGponDeviceOntEthernetDuplexMode.4194362624.1.1 = INTEGER: autoneg(3)

HUAWEI-XPON-MIB::hwGponDeviceOntEthernetSpeed.4194362624.1.1 = INTEGER: autoneg(4)

HUAWEI-XPON-MIB::hwGponDeviceOntRegisterInfoSN.4194362624.1.0 = Hex-STRING: 42 42 42 42 42 42 42 42 00 00 00 00 00 00 00 00 

HUAWEI-XPON-MIB::hwGponDeviceOntRegisterInfoType.4194362624.1.0 = STRING: "HN8010Ts"

HUAWEI-XPON-MIB::hwGponDeviceOntRegisterInfoUpTime.4194362624.1.0 = STRING: "2023-08-17 10:08:12Z"

HUAWEI-XPON-MIB::hwGponOntStatisticUpPackts.4194362624.1 = Counter64: 215415901
HUAWEI-XPON-MIB::hwGponOntStatisticDownPackts.4194362624.1 = Counter64: 235005713
HUAWEI-XPON-MIB::hwGponOntStatisticUpBytes.4194362624.1 = Counter64: 238753659281
HUAWEI-XPON-MIB::hwGponOntStatisticDownBytes.4194362624.1 = Counter64: 73813853889
HUAWEI-XPON-MIB::hwGponOntStatisticUpDropPackts.4194362624.1 = Counter64: 0
HUAWEI-XPON-MIB::hwGponOntStatisticDownDropPackts.4194362624.1 = Counte