Deploying Java Azure Functions with zip deployment

Our team currently is able to properly deploy Azure Functions using Maven with the Azure Functions Plugin.

```
mvn clean package azure-functions:deploy "-DfunctionAppName=my-test-app" "-DfunctionAppRegion=centralus" "-DfunctionResourceGroup=my-test-rg"
```

We have tried exploring using zip deploys with both the Azure CLI and the zip deploy endpoint but with no success.

```
mvn clean package "-DfunctionAppName=my-test-app" "-DfunctionAppRegion=centralus" "-DfunctionResourceGroup=my-test-rg"
cd target/azure-functions/
zip -r my-test-app.zip my-test-app/
az functionapp deployment source config-zip -g my-test-rg -n my-test-app --src my-test-app.zip
```

```
mvn clean package "-DfunctionAppName=my-test-app" "-DfunctionAppRegion=centralus" "-DfunctionResourceGroup=my-test-rg"
cd target/azure-functions/
zip -r my-test-app.zip my-test-app/
curl -X POST -u "$my-test-app" https://my-test-app.scm.azurewebsites.net/api/zipdeploy -T my-test-app.zip
```

In both cases, I have confirmed the zip files were correctly uploaded to the Azure Function by downloading the app content after the zip deployments. From what I can see, the downloaded zip has the exact same files as the Maven Azure Functions Plugin deployment, but when we deploy with the zip methods the functions do not show up in Azure. Is there a deployment step we are missing?