Zabbix Discovery Rule | Multiple Values | Not Supported & Item does not allow parameters

I am trying to fetch windows process metrics and facing some difficulties.
To begin with I created a new template, added a discovery rule and named the key win.process.metrics

Then I created 2 item prototype with following key.

Type Zabbix Agent(Active): win.process.metrics[{#PID}]
Type Dependent Item: win.process.metrics[{#PROCESSNAME}]

I created 2 LLD macros for the same

{#PROCESSNAME} = $.ProcessName
{#PID}=$.Id

Then I created userparameter in zabbixAgent conf file

UserParameter=metric.process.discovery,powershell -NoProfile -ExecutionPolicy Bypass -File "C:Program FilesZabbix AgentscriptsProcessMetrics.ps1"

Content of the PowerShell script

Get-Process | Select ProcessName, Id, Description | ConvertTo-Json -Compress

Here is the sample result

[
  {"ProcessName":"chrome","Id":1232,"Description":"G oogle Chrome"},
  {"ProcessName":"chrome","Id":1500,"Description":"G oogle Chrome"}
]

When I enable the item prototype, I see that data is ingesting however for PID process I see item does allow parameters error

I would like to know how can I ingest multiple key value pairs using one discovery rule. Is it possible in first place?

Appreciate your guidance in resolving this issue.