The closest thing I've got is this paper ("A New Theory of Gender Dysphoria Incorporating the Distress, Social Behavioral, and Body-Ownership Networks"). It was unfortunately retracted since it sparked some controversy, so I dunno if it's actually worth anything, but I'll offer it up as food for thought.

This piece discusses the paper and its retraction, and it's not really relevant to your question, but it does quote the initial version of the paper before it was corrected, which I'll also quote here:

“The use of gender reassignment as a therapy is sometimes motivated on the assumption that the distress is due to the individuals having a brain sex different than their gender assigned at birth and that the desire to change genders is based on a correct sense of true gender (...) Our new theory furthers the discussion regarding biologically-based treatments independent of gender identity affirmation that might address distress and body ownership in individuals with gender dysphoria. (...) treatments based on our new theory could instead involve targeting the distress and/or body ownership networks, perhaps specifically seeking to restore a sense of ownership over body parts perceived as incongruous.”

Of course there's nothing in the way of actual treatment here since the paper itself was just discussing a theory rather than anything in practice, but I thought it was pretty interesting to read about.