Ability to customize metatags by entity / bundle

I apologize if this feature already exists, but I didn't find it.

I am requesting the ability to select which metatags show up on the form display of a particular metatag field (field settings, maybe?).

Currently, I can add a metatags field to an entity and can specify default values for all metatag fields. However, I don't seem to have the ability to select which metatags I want to enter.

This is more of a usability concern than a functional one. But, it would be nice to be able to select which metatag attributes I want per metatag field.