Allow adding custom values to OOTB enumerations

[#1]

For example we may want to additional value like "Non Binary" to OOTB Gender field's enumeration.

[#2]

Hello,

This is not doable and not in the roadmap. The only way to "extend" this is by adding a custom resource and create your own enumeration. In this case, the OOTB enumeration won't be used, but it can't be hidden.