I am just hitting the limitation of labeling polygons which cannot be repeated:
https://developers.arcgis.com/javascript/latest/api-reference/esri-layers-support-LabelClass.html#re...

I have very long and narrow polygons (tunnels) and for this use case, having a single label at the center of the polygon is really not convenient. This property for lines has been added at 4.22 so a while ago.
It would be great if this support could be added.
Thanks for listening as usual !
Best regards,
Nicolas