Expert for SAPUI5 Odata v4 Implementation

Description:
I need to create a at least 100 new items to a specific ServiceContract in the SAPUI5 Odata V4 Context

Settings:
POST host/sap/opu/odata4/sap/api_servicecontract/srvd_a2x/sap/ServiceContract/0001/ServiceContract(ServiceContract='7000001503')/_Item HTTP/1.1
Content-Type: application/json

Typical oItem = {
"ServiceContractItemCategory ": "SCN",
"Product": "SRV_01",
"ServiceContractItemQuantity": 1,
"SrvcContrItemQtyUnitISOCode": "HUR",
"SrvcContrItemQtyUnitSAPCode ": "STD"
}

Problem:
- When trying to add not one item but 100 there is a gateway timeout, batching doesnt work.
- Batching doesnt work

ToDo:
- Develop me a SAPUI5 Syntax that would add 100 new items towards the following backend point

Start:
oServiceContractModel.bindList(`/ServiceContract(ServiceContract='${sServiceContractNr}')/_Item`)



Links:
https://help.sap.com/docs/SAP_S4HANA_ON-PREMISE/e94543741b6142e198a86f908c698978/9ddd0cb9a96547b0b91d3e6316588575.html?version=2023.003