How to get two Bookmarks folders to open in two separate Private windows?

Is there a way – from the Bookmark Manager page – to get two different bookmarks folders to open in two separate Private windows?

That would seem to require an ‘Open all in New Private Window’ for the second folder, which isn’t currently a selectable option.

My experience has been that selecting “Open all in Private Window” invariably directs all the bookmarks in multiple folders into a single Private window. Most of the time I would like to keep them in separate Private windows, matching their bookmark organization in separate bookmarks folders.

I’ve noted this as a request in the Feature Request forum . . . Bookmarks link to "Open [bookmarks] in Private Window" lacks a "New Private Window" option . . . but thought I’d check here for a way to do it that I may have overlooked.