I had the same request to expose data from SYNAPSE in a REST API. I did not find some direct solution without an azure web app or function app. As I'm not a code developer, The simpliest way for me was to use a function app with this method: https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-azure-sql?tabs=in-process%2Cextensionv4&pivots=programming-language-csharp
The code generated is minimal and quite readable for a non developer. I agree that this common request should be available by some way in the Synapse sql pool. You need to install a bunch of development software (VS2022, VS code,..) on your machine for a simple use case.