Developer Note: Adding Automatic Output Variable Support to your Custom Property Editor

The Custom Property Editor Developer’s Guide has been updated to include material about the new @api automaticOutputVariables attribute. If you use FlowComboBox in your CPE, you should create this attribute and then make sure to pass the resulting data to FlowComboBox along with the builderContext data. This will cause your embedded ComboBoxes to provide access to all upstream merge fields.