Create new relation object from another collection type

I want to be able to create a new object of relation collection type from another collection type.
For example, create a new tag from a relation field in my blog post collection type:

image (1)

By the way of implementation I thought about such options:

  • Add a new button which would be opened a new window.
  • Enter some word and create a new entry on its basis.

I’ve tried to modify components RelationPreviewList and SelectWrapper but of no effect.

Thanks in advance

This would be really helpful for my usage. Has someone been able to do this?