I have created a simple web API in ASP.NET Core and wanted to publish to Azure Web App. I'm using free trial subscription and have only one web app resource created in Azure. The app service plan is using free tier 'D1' SKU and is the only one present in my subscription. However, while trying to publish the web API by choosing this web app in Visual Studio publish profile, it says 'there are no existing instances available'.
The web app resource does appear here:
Clicking next while the resource is selected, results in the issue:
hoststart.html
KUDU Console of Initial App Service
KUDU Console of App Service after Publishing the WebAPI from Visual Studio
Deployed WebAPI Output
Update
You are in the correct path, after selecting the web app it asks to create the api.Click on the + symbol and add the API Management