I had a similar issue, i actually removed the integration runtime section from the json file and also had an issue with linked services so amended that slightly too. The file that we used successfully which included exposing parameters from the pipelines is attached but needs the extension renaming obvs.114634-template-parameters-definition.txt
Synapse Analytics Workspace CI/CD - Publishing with Custom Parameter Template
Anonymous
We are experiencing unexpected behavior trying to implement a custom parameter template (template-parameters-definition.json) per the documentation. Values, ex. pipeline parameters, defined are not populated when deploying causing validation errors in the target workspace. Is anyone successfully using custom parameters for promoting workspace artifacts to environments?