Create new records / selections in linked fields on an interface - ON / OFF toggle missing??

[BenFortunato]

I used to be able to allow users to create new records on linked fields but now I can't find this functionatlity. There was a toggle, editible and allow users to create a new field. This also applied to single select or multiple select categories. Is there a way to turn this feature back on? 

[TheTimeSavingCo]

Hmm I'm able to allow this to happen via the sidesheet:

May I know which interface layout you're facing this issue with?

[BenFortunato]

It seems that I am able to add editing to linked fields when in the interface and editing a record, but not when using a form to add a record. When adding a record, you don't have the ability to add a linked field and then open up a drawer or modal in order to edit the field that you are adding. YOu need to add the record press submit and then open the record again in the interface to edit.