I can’t think of any way other than individually copying and pasting the contents of individual notes to do this.
My idea is to be able to get access to the notes in their coded format as opposed to the preview format that transclusion provides.
The benefit of this to me would simply be combining the many notes together without all the hassle. Come to think of it, I have already requested this before and I think you actually had commented on a posted response that simplified the workflow I suggested. Here: Note Combo-Linker
There may be an opportunity to have something that takes a list of transcluded notes and allow for the result to be selected in a quasi-WYSIWYG. I saw some good ideas about transcluded notes being editable here: Folding Embedded/Transcluded Notes
I got a little confused and intimidated by the coding for the refactor/extractor merged topic but now looking at it with fresh eyes am seeing the exact parallels. My bad. Here it is: Extract Note / Refactor
Thanks.