(🎁) Create merge request discussion through GraphQL api (like REST)

I would like to create a merge request discussion exactly like this rest API supports (diff possition ommitted): https://docs.gitlab.com/ee/api/discussions.html#create-a-new-thread-on-the-overview-page

Notice the position fields are only required when a position* field is supplied.

As far as I can tell this is impossible with the current GraphQL API and is a missing feature parity.