Hello,
it would be nice if on the properties page of custom dictionaries (webStyles) in AGOL and AGE the dictionary_configuration variables could be seen and also changed with effect to the layer(s) (as it is possible in ArcGIS Pro) which are referencing the style. Also possible would be to have the properties at the layer properties page which is referencing a custom dictionary. In this case only this one layer would be effected by the settings of the global configuration variables. Not sure what would be better.