How to get the Azure Data Factory parameters into the ARM template parameters file (ARMTemplateParametersForFactory.json) after publishing

I am trying to create my Azure DevOps release pipeline for Azure Data Factory.

I have followed the rather cryptic guide from Microsoft (https://learn.microsoft.com/en-us/azure/data-factory/continuous-integration-deployment ) regarding adding additional parameters to the ARM template that gets generated when you do a publish (https://learn.microsoft.com/en-us/azure/data-factory/continuous-integration-deployment#use-custom-parameters-with-the-resource-manager-template )

Created a arm-template-parameters-definition.json file in the route of the master branch. When I do a publish, the ARMTemplateParametersForFactory.json in the adf_publish branch remains completely unchanged. I have tried many configurations.

I have defined some Pipeline Parameters in Data Factory and want them to be configurable in my deployment pipeline. Seems like an obvious requirement to me.

Have I missed something fundamental? Help please!

The JSON is as follows:

{
    "Microsoft.DataFactory/factories/pipelines": {
        "*": {
            "properties": {
                "parameters": {
                        "*": "="                
                }
            }
        }
    },
    "Microsoft.DataFactory/factories/integrationRuntimes": {
        "*": "="
    },
    "Microsoft.DataFactory/factories/triggers": {},
    "Microsoft.DataFactory/factories/linkedServices": {},
    "Microsoft.DataFactory/factories/datasets": {}
}

I've been struggling with this for a few days and did not found a lot of info, so here what I've found out. You have to put the arm-template-parameters-definition.json in the configured root folder of your collaboration branch:

So in my example, it has to look like this:

If you work in a separate branch, you can test your configuration by downloading the arm templates from the data factory. When you make a change in the parameters-definition you have to reload your browser screen (f5) to refresh the configuration.

If you really want to parameterize all of the parameters in all of the pipelines, the following should work:

"Microsoft.DataFactory/factories/pipelines": {
    "properties": {
        "parameters":{
            "*":{
                "defaultValue":"="
            }
        }
    }
}

I prefer specifying the parameters that I want to parameterize:

"Microsoft.DataFactory/factories/pipelines": {
    "properties": {
        "parameters":{
            "LogicApp_RemoveFileFromADLSURL":{
                "defaultValue":"=:-LogicApp_RemoveFileFromADLSURL"
            },
            "LogicApp_RemoveBlob":{
                "defaultValue":"=:-LogicApp_RemoveBlob"
            }
        }
    }
}