Power Apps doesn't return any Cavas applications

Question

I'm making my first steps with Power Apps and its web API and failing on the most basic request. I created two super simple canvas applications, yet I'm getting a successful but empty response from the API.

Request URL is:

https://<my-org>.api.crm4.dynamics.com//api/data/v9.2/canvasapps

Response is:

{
    "@odata.context": "https://<my-org>.api.crm4.dynamics.com/api/data/v9.2/$metadata#canvasapps",
    "value": []
}

Any idea what's missing?