The following sample shows a great use of the CIMSymbol in the ESRI JS API.
https://developers.arcgis.com/javascript/latest/sample-code/cim-symbols/index.html
Is it possible to set the textString property on the markergraphic to an attribute of the graphic?
https://github.com/Esri/cim-spec/blob/master/docs/v2/CIMSymbols.md#cimmarkergraphic
I'd like to place a number (attribute of the graphic) in the centre of the symbol and have tried "{$feature.numfld}" but this just displays the text string, not the expresssion value.