However when I am trying to add 'fill-extrusion' layer (similar to this example: Extrude polygons for 3D indoor mapping | Mapbox GL JS | Mapbox ) ESRI throws an Error: Unknown vector tile layer
Here is my code (Vector Tile layer is commented): https://codepen.io/tomaszbarczyk/pen/RwwYdPv?editors=1000
Is it a bug or Vector Tiles are not fully supported yet?
Fill extrusions are not supported in JS API for ArcGIS at this time. It will be added in the future but I do not have a concrete timeframe for this.