Multiple Backends and Multiple Frontends for Standard Loadbalancer via ARM template

I am trying to create a Standard Loadbalancer template having multiple backend pools and multiple frontend properties but was getting a below error. I tried deploying the template through "copy" function but getting an error of invalid property

**Error: {"code":"DeploymentFailed","message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.","details":[{"code":"BadRequest","message":"{\r\n \"error\": {\r\n \"code\": \"InvalidTemplate\",\r\n \"message\": \"Unable to process template language expressions for resource '/subscriptions/xxxxx-xxxx-xxxx-xxxx-xxxxxxxx/resourceGroups/rg1/providers/Microsoft.Network/loadBalancers/app1-a-lb' at line '303' and column '9'. 'The language expression property 'lbBackendPoolName' doesn't exist, available properties are 'name, FrontendIPConfigurations, backendAddressPool, healthProbe, protocol, frontendPort, backendPort, idleTimeoutInMinutes, enableFloatingIP'**

Start with the ARM template deployment described in the issue and inspect the expression at line 303, especially the use of `lbBackendPoolName` against the listed available properties. Reproduce the deployment error with multiple backend pools and frontend properties, then verify that the corrected template deploys successfully.

Written by the indexing model from the issue text.