I created a simple FeatureLayer called Cryptids2 to test the Editor widget. The idea is the user can click on the map and indicate whether they saw, say, Bigfoot or a jackalope or two other types of creatures. I gave each of the four types a unique symbol in my webmap, but on the Editor widget the default "New Feature" with a circle shows up, rather than showing my four symbols.
This behavior is in contrast with a second layer I added, the "Hazard" layer that is used in the Editor widget documentation. If you look at the widget on my Pages site https://ericdmj.github.io/edittest/, you can see that the Hazard layer works as expected, with the user able to see and click icons associated with values and add them to the map. But if you scroll down in the widget, my Cryptids2 layer isn't being equally fancy. Any notions why that is? (Attached is a picture of the Editor from my GitHub site showing what I mean.)
Here's my webmap. (Attached is a picture showing the Legend from that with the symbols I want to appear in my Editor widget.)