I was assuming there is a tutorial or an example somewhere
AFAIK that is the only time anyone has asked about sharepoint in 8+ years. It’s just not anything we have ever been prompted to prioritize in any way (also none of the core devs have ready access to any sharepoint to test with afaik). Which doesn’t mean we don’t want to help, but you just need to realize that this is not at all a common request, and that you are basically breaking new ground, so it will be a process.
You say there is no error. To be clear I am asking about the browser JavaScript console, have you checked the the JavaScript console?